Pearl agate is jewelry since ancient times and it is also a symbol of human identity and wealth. In terms of its texture, agate ornaments and ornaments are beautiful and beautiful, their luster is no less than jade! However, with the agate mineral deposits being discovered in large quantities around the world, agate is no longer a rarity. Due to the unrestricted and disorderly mining of the agate deposit, the distribution of jewelry processing is widespread, and the price presents a vicious competition in the market environment. In the past two years, the price has dropped to the bottom. With the devaluation of the currency and the increase in prices, prices are still rebounding, but the price still remains. Very cheap. Although most of the color agate on the market is currently warmed and burned, manual optimization of the burn color is the default industry practice and universal procedure in the jewellery industry, because naturally good color agate is rare, mostly white or gray, natural Red agate is rare, natural green agate less, but also not burning green, can only stain, 99% of all green agate on the market are dyed, green bracelets wear for a long time will fade, is said to wear on the body Harmless to the body! The red onyx currently on the market is generally red-hot, not only looks good, but also harmless to the body. A burning agate bracelet, with artificial, material, and profit, cost about 30 yuan, the wholesale price is very cheap, some natural fine agate bracelets or synthetic agate, in Panjiayuan, Liaoning, Fuxin, Liaoning Agate wholesale market, the wholesale price of a bracelet is generally 20-25 yuan, retailers get the local general retail price of 50-80 yuan. As we all know, everything is like this. The same thing has both quality and defective products. The price of natural agate bracelets is also around 100 yuan, and some even reach several hundred yuan and several thousand yuan. A few days ago, I went to visit China’s Jewel City in Changle, Shandong. The price of an agate bracelet was between 40 and 60 yuan. I saw a pair of agate bracelets with better colors. The boss asked for 1,600 yuan. I also The price of 500 yuan has not been traded, and the final price increase to 760 yuan, businesses have to 800 yuan, I simply do not, and choose another home. Regardless of the optimization, the common ones in the small shops are not good agates. The real good agates are reserved by the big customers and are rarely found in small shops. A piece of a few hundred yuan good agate material carved ornaments, and some can be sold for more than 10,000 yuan. However, the general decoration price is more than a few hundred dollars, which is obviously lower than the price of the jade jewelry. Although the hardness of the jade is low, the color is also very light, and many thin parts tend to fade, combined with a large output, its output accounts for about the current national About 70% of the total jade production, so the price is relatively cheap, in the "Lotus Market" in Saitama Prefecture, the dark green and fine texture of medium-to-high grade nude stones cost 200-250 yuan per kilogram. Taobao passengers can take the train to After getting off from Anshan, the passenger bus from Anshan to Xiuyan County soon. In Nanyang, the hometown of jade carving in China, Dushan Jade Carving has formed a large industry. In Dushan, Wolong District, Pingxiang Stone Buddha Temple, it can be described as “the village machine rang, every family sings jadeâ€, one street and two rows of workshops, Lin Li, Yu Yu The voices are endless, and it is one of the distributing centers of jade and agate in China.
Agate is one of China's traditional jewels. China is a country rich in agate, and its texture is also significantly better than agate produced in Brazil and other places. In many people's eyes, the pearl agate is a symbol of wealth. Jade and agate are crystal clear, beautiful patterns, colorful, but similar in nature, the average consumer is difficult to tell the truth. What's more, is the agate with a long history a stone or jade? In the historical literature, "Red Jade" and "Fire Jade" refer to ruby ​​or red agate? These historical issues remain very controversial. Thousand kinds of agate 10,000 kinds of jade, there are many types of agate, there are mountain agate, water agate, etc., the color is also very rich. Agate has many colors, such as red, white, yellow, blue, black, purple, green, gray, brown, but with three colors of red, white, and black. There are also patterns such as silk. Among them, red agate is known as the top grade, so in the "Gugao theory" in the "Agate is not red, a poor," said. The texture of the agate is like crystal, delicate and without impurities, glossy glassy, ​​transparent or translucent. It is mostly lamellar. Each layer overlaps with each other and forms a variety of patterns such as corrugated, concentric, mottled, lamellar, and so on. Agate is jade or stone? This controversy lasted for 1500 years in China. After the Ming Dynasty, it was gradually accepted as a raw material for jade. However, some of its mysterious veils have not yet been fully revealed. Most people still think that agate is broadly defined. Jade believes that agate is a jadeite crystal mineral. Although it has the texture of jade, it is not real jade. As far as its status is concerned, it is at best a mid-range "Yu-Yu." Some businesses advocate it as a high-grade jade material, which is purely a flamboyant consumer nonsense!
■Agate, which is a kind of jade with a cluster of minerals mainly composed of cryptocrystalline quartz (chalcedony), was called “Qiongyu†in ancient times. Its formation is due to changes in the earth's crust during the ancient times. Underground magma was ejected. During the process of cooling and consolidation of lava, bubbles formed by steam were enclosed and formed caves. After several years, the silica-containing solution penetrated into the bubbles and condensed into silica gel. Soluble components such as iron-bearing rocks diffuse into the silica gel. Finally, with the loss of water, the silica crystals become agate. Because the soluble components such as iron-containing rocks diffuse into the silica gel, the color of the agate becomes colorful, and the color and pattern are beautiful. It is often used to make jewelry, carving pieces and other crafts. It is known as one of the seven treasures and is the stone of longevity. It is deeply loved by people.
The mineralogical name of agate is chalcedony, which does not belong to the crystal class. The word "agate" is derived from the Buddhist scriptures, also called aragonite, also called the brain of the horse. English name Agate, non-Yu Feishi, self-contained.
Agate's evaluation includes: ribbon structure, color, transparency, and block size. Smooth surface, high transparency; fine texture, toughness; no cracks or cracks; block size is better. The more distinct, clearer, finer, and more uniform the pattern of agate, the better the linearity and the more precious it is. The color is bright and pure, and the color layer is thick. In agate, the best red and blue are the best, followed by the green ones. Of course, the very good blue agate, green agate, black agate and red agate are just as rare species and worth a lot of money.
Compared to Emerald Jade, due to its wide agate production area and rich mineral deposits, it is rich in cultural connotations and is considered a symbol of beauty, happiness, auspiciousness, and prosperity. Although it is cheap, it is loved by many people who love beauty and fashion. Nowadays The social demand is also great. Driven by profits, the shoddy phenomenon on the market is also very serious. Here are some of the common sense and key points that can be used to identify the quality of agate, agate, and fake without using any inspection equipment. This allows you to buy the right agate jewelry at the right price.
â— The jewellery market has never been a pure land, and the phenomenon of shoddy goods on the market is very serious. Relatively speaking, it is because of the low value of agate now, no one will be willing to make great efforts to produce fake agate to be confused, agate is still regarded as the most cherished jewelry in the jewelry market. However, there are some synthetic agates, stone agates and plastic agates on the market.
First, the pattern and color The difference between natural agate and fake agate is that its cross section has a concentric layered structure. Using this mark, the whole piece of agate is easier to recognize. However, the finished product after cutting is not neat. Obvious patterns are easy to mistake. But in general, it is real agate with a pattern. The real agate is bright and bright, and the color and light of the fake agate are all worse. The two are more obvious. The color of agate determines its value. The ancients said: "The agate is not red and I was poor." In the agate, there are yellow in the red, yellow in the red, and the transparent fire is the top grade, which is called "fire agate." Its red color is red, purple, dark red, brown red, red sauce, yellow red and so on. In addition, the color red Yanyan Jin Jin agate, red and white ginseng called Jinhua agate or red flower agate. Valuable addition to the red agate, there are green agate, blue agate and purple agate and water agate. The natural red agate has a distinct color and the band is very clear. After careful observation, dense red spots are densely arranged on the red band. Most of the fake agate pots imitated with stone have a petal pattern at the bottom, forming a “chrysanthemum bottomâ€; the dyed blue agate is bright and uniform, giving a false feeling.
The thickness and shape of the ayurveda pattern can be further divided into many kinds. In the “Talkâ€, “The southern part of the country is coloured and red is unblemished; the northwest part is green and black, and it is called a ghost face. The green room is red. The spider silk is a wonderful thing, with branches and leaves, such as cypresses and cypresses, agates, black and white, gold and agate, texture, black and white, and green, and zygote, agate, and brilliance. The fetal agate is the most precious item."
The chemical composition of agate with no tapering patterns is single, namely SiO2 (CeO2), which is called chalcedony. If the chalcedony is mixed with protein or cryptocrystalline particulate quartz during the formation process, a ribbon pattern called agate is formed. Therefore, by virtue of the ribbon pattern can determine what is chalcedony, what is agate. But nowadays people generally equate agate with chalcedony, which is inconsistent with the ancient agate. Strictly speaking, there is no texture pattern, it can not be called agate, only chalcedony. In the "chalcedony" with no ribbon pattern, there are many jade materials. According to the different colors, there are "red chalcedony", "green chalcedony" (also known as Inca stone), "green chalcedony", "blood chalcedony" (also known as blood stone) and "jasper" and so on.
Agate is naturally colored and artificially colored. The natural colors are mainly red, amber, and white. Among them, red is the best. Most of the blue and purple agate jewellery on the market are not natural, they are artificially dyed and fade after a few years.
At present, for the agate, the requirements for the new national standard are not strict, and it is considered as an acceptable quality improvement process method, so it is unnecessary to specify when selling. Agate and chalcedony have a rind, opaque, opaque and variegated. Since the color of natural red agate is mostly not bright, agate and chalcedony generally undergo heat treatment to change color. Generally, agate, which is not natural, such as gray and light color, is dyed red, yellow, and green. Blue, black and other colors. For example, agate and chalcedony containing divalent iron ions can be heat-treated to convert divalent iron ions to trivalent iron ions so that the gray color turns red, from maroon, red sauce to bright red; the egg agate is heat treated. , From the egg blue to white, dyed soft agate color, made out of the jewelry is more beautiful, therefore, the heat treatment of agate has become a common procedure for making jewelry.
Second, texture Because the agate is formed in the molten state of the crystal, particularly dense, Mohs hardness of 6.5 to 7 levels, the surface is more delicate after grinding, with a knife can not be traced, so you do not have to worry about agate jewelry was scratched. True agate rubbed a dozen times on a hard wood board, agate was not hot, and the board was hot.
The fake agate is mostly made of stone, and it is softer than the real agate. The jade can be used to mark the fake agate, but the genuine product is not drawn.
The synthetic agate has a hardness of less than 5 on the Mohs, and can be traced with a knife.
On the surface, real agate is less profane, and fake agate is more.
Some cast glass products have strong glass luster, and the surface has shrinkage and no trace of polishing. Small bubbles can be observed with a magnifying glass, and can be made opaque with orthogonal light under polarized light, so it is completely compatible with agate and chalcedony Differentiate.
Because the glass texture is very brittle and rigid, the structure is arranged to be clear, and the lack of compactness and toughness of jade can not withstand the strong high-speed rotary engraving. Therefore, high relief and round carved jewelry cannot be processed on the glass.
Use a 10x magnifying glass to find out whether there are bubbles or not. If only one is found, you can confirm that it is glass, not jade.
Third, the process quality and high quality of agate production process is strict and advanced, so the surface brightness is good, inlaid firmly, Zhou Zheng, no scratches, cracks.
Fourth, the level of water tank agate is agate in the most precious species, is characterized by a closed hole in the agate, the hole contains water.
The quality of the agate and the assessment of its economic value: beautiful patterns; pure, bright red, blue, purple and pink; good transparency, translucent; no cracks, no sand, no impurities; More than 5 kg are special agate. Those with a weight of about 2-5 kg ​​are grade a agate; those with a weight of about 0.5-2 kg are grade 2 agate; those with a weight of about 0.5 kg or less are grade 3 agate.
Agate carving crafts to block large, as the jewelry cut stone to color the United States is better. The flowers work out with skill and skill, and the prime work is very expensive. The carving techniques are generally divided into two categories: flower work and vegetarian work. Flowers such as flowers, converters, birds, beasts, Shi women's objects; vegetarian works such as rings, bracelets, earrings and so on. When purchasing, it should be comprehensively evaluated in terms of its color, texture, transparency, and craftsmanship.
5. Transparency and Gloss True agate surface is coated with a layer of wax. It is slightly chaotic. Its transparency is not high. It has the luster of wax. Some can see the natural waterline or "cloud". Translucent texture is a glassy luster. . The synthetic agate is transparent and transparent like a glass ball.
Agate has a typical band structure, and the finished edge has a ring of halos.
Some fake agates have a thin layer of organic matter on their surfaces, like a waxy luster, but they don't feel the same way.
6. The proportion of weight agate is 2.65. True agate jewelry is heavier than synthetic agate jewelry. Plastic replicas are light and easy to distinguish.
Seven, the temperature natural agate feel cool, but it feels cool in winter and cool in summer. The synthetic agate changes with the outside temperature, and it gets hotter in the hot days, and it cools in the cool days.
â– Similarities and differences between crystal and agate Although the chemical composition of both crystal and agate is silica, there are some differences between the two. Crystal is a single crystal, a crystal is usually a crystal crystal, and agate is a polycrystalline assembly. Electron microscopy shows that agate is made up of numerous tiny silica crystals, so agate is usually translucent, while crystal is transparent.
â– The difference between agate and chalcedony and similar jade The agate and chalcedony are both cryptocrystalline quartz, and collectively referred to as chalcedony in mineralogy. The gems world has a cryptic crystal block quartz with agate texture. Onyx has a variety of colors in the band strips, if the block without band structure is called chalcedony. The crystal morphology is cryptocrystalline with a granular, fibrous structure. The aggregates are often galenoid, kidney-shaped, tuberculous, and dense. Pure agate and chalcedony are white, because the agate color is rich in pigment ions and impurities, so there are "a thousand kinds of agate million kinds of jade," said the color is red, blue, green, light green, yellow brown, brown, purple , gray, black and other colors, and there are concentric, layered, corrugated, striped patterns. Grease gloss to glass, transparent to translucent. No cleavage, conchoidal fractures, cracks.
Agate and chalcedony can be distinguished according to different colors, bands and other patterns. The chalcedony products are easy to be confused with the Dongling stone, dense jade, and jasper, and can be distinguished based on differences in color, texture, and density. Chalcedony products are bright, cryptocrystalline and delicate in texture. Quartzite particles such as Dongling Stone are coarse, fine grained and relatively coarse in texture. Jade similar to green chalcedony has green jade, turquoise, and celestial stone. Green Jade changes spotted interweave structure, and it can be seen as speckle or fibrous jadeite crystal. Turquoise transparency is poor, porcelain gloss, low hardness, 5-6. Tianhe stone has obvious grid-like stripes.
â– Evaluation and purchase of agate and chalcedony According to the morphological characteristics of agate, it can be divided into the following varieties: Onyx (with agate and cut agate), red agate, moss agate (also known as dendritic agate), Scenic agate (also known as the city agate), fire agate, water agate. The famous Nanjing "flower stone" is a type of agate with a concentric pattern. Agate's evaluation and purchase factors are color, transparency, and blockiness. Process requirements are bright colors, pure, thick color layer; smooth surface, high transparency; decorative uniform, clear, good linearity; fine texture, toughness; no cracks or cracks; large block size. Red and blue are best. Chalcedony varieties: green chalcedony (also known as Australian jade, China also known as Inka stone), thick green chalcedony, Pitt stone, blood chalcedony (also known as bloodstone) and so on. The color of chalcedony is pure and beautiful, and the bigger the block, the better. The quality of green chalcedony and verdant chalcedony is the most precious. Chalcedony is processed into rings, bracelets, necklaces and other jewelry.
Agate is one of China's traditional jewels. China is a country rich in agate, and its texture is also significantly better than agate produced in Brazil and other places. In many people's eyes, the pearl agate is a symbol of wealth. Jade and agate are crystal clear, beautiful patterns, colorful, but similar in nature, the average consumer is difficult to tell the truth. What's more, is the agate with a long history a stone or jade? In the historical literature, "Red Jade" and "Fire Jade" refer to ruby ​​or red agate? These historical issues remain very controversial. Thousand kinds of agate 10,000 kinds of jade, there are many types of agate, there are mountain agate, water agate, etc., the color is also very rich. Agate has many colors, such as red, white, yellow, blue, black, purple, green, gray, brown, but with three colors of red, white, and black. There are also patterns such as silk. Among them, red agate is known as the top grade, so in the "Gugao theory" in the "Agate is not red, a poor," said. The texture of the agate is like crystal, delicate and without impurities, glossy glassy, ​​transparent or translucent. It is mostly lamellar. Each layer overlaps with each other and forms a variety of patterns such as corrugated, concentric, mottled, lamellar, and so on. Agate is jade or stone? This controversy lasted for 1500 years in China. After the Ming Dynasty, it was gradually accepted as a raw material for jade. However, some of its mysterious veils have not yet been fully revealed. Most people still think that agate is broadly defined. Jade believes that agate is a jadeite crystal mineral. Although it has the texture of jade, it is not real jade. As far as its status is concerned, it is at best a mid-range "Yu-Yu." Some businesses advocate it as a high-grade jade material, which is purely a flamboyant consumer nonsense!
■Agate, which is a kind of jade with a cluster of minerals mainly composed of cryptocrystalline quartz (chalcedony), was called “Qiongyu†in ancient times. Its formation is due to changes in the earth's crust during the ancient times. Underground magma was ejected. During the process of cooling and consolidation of lava, bubbles formed by steam were enclosed and formed caves. After several years, the silica-containing solution penetrated into the bubbles and condensed into silica gel. Soluble components such as iron-bearing rocks diffuse into the silica gel. Finally, with the loss of water, the silica crystals become agate. Because the soluble components such as iron-containing rocks diffuse into the silica gel, the color of the agate becomes colorful, and the color and pattern are beautiful. It is often used to make jewelry, carving pieces and other crafts. It is known as one of the seven treasures and is the stone of longevity. It is deeply loved by people.
The mineralogical name of agate is chalcedony, which does not belong to the crystal class. The word "agate" is derived from the Buddhist scriptures, also called aragonite, also called the brain of the horse. English name Agate, non-Yu Feishi, self-contained.
Agate's evaluation includes: ribbon structure, color, transparency, and block size. Smooth surface, high transparency; fine texture, toughness; no cracks or cracks; block size is better. The more distinct, clearer, finer, and more uniform the pattern of agate, the better the linearity and the more precious it is. The color is bright and pure, and the color layer is thick. In agate, the best red and blue are the best, followed by the green ones. Of course, the very good blue agate, green agate, black agate and red agate are just as rare species and worth a lot of money.
Compared to Emerald Jade, due to its wide agate production area and rich mineral deposits, it is rich in cultural connotations and is considered a symbol of beauty, happiness, auspiciousness, and prosperity. Although it is cheap, it is loved by many people who love beauty and fashion. Nowadays The social demand is also great. Driven by profits, the shoddy phenomenon on the market is also very serious. Here are some of the common sense and key points that can be used to identify the quality of agate, agate, and fake without using any inspection equipment. This allows you to buy the right agate jewelry at the right price.
â— The jewellery market has never been a pure land, and the phenomenon of shoddy goods on the market is very serious. Relatively speaking, it is because of the low value of agate now, no one will be willing to make great efforts to produce fake agate to be confused, agate is still regarded as the most cherished jewelry in the jewelry market. However, there are some synthetic agates, stone agates and plastic agates on the market.
First, the pattern and color The difference between natural agate and fake agate is that its cross section has a concentric layered structure. Using this mark, the whole piece of agate is easier to recognize. However, the finished product after cutting is not neat. Obvious patterns are easy to mistake. But in general, it is real agate with a pattern. The real agate is bright and bright, and the color and light of the fake agate are all worse. The two are more obvious. The color of agate determines its value. The ancients said: "The agate is not red and I was poor." In the agate, there are yellow in the red, yellow in the red, and the transparent fire is the top grade, which is called "fire agate." Its red color is red, purple, dark red, brown red, red sauce, yellow red and so on. In addition, the color red Yanyan Jin Jin agate, red and white ginseng called Jinhua agate or red flower agate. Valuable addition to the red agate, there are green agate, blue agate and purple agate and water agate. The natural red agate has a distinct color and the band is very clear. After careful observation, dense red spots are densely arranged on the red band. Most of the fake agate pots imitated with stone have a petal pattern at the bottom, forming a “chrysanthemum bottomâ€; the dyed blue agate is bright and uniform, giving a false feeling.
The thickness and shape of the ayurveda pattern can be further divided into many kinds. In the “Talkâ€, “The southern part of the country is coloured and red is unblemished; the northwest part is green and black, and it is called a ghost face. The green room is red. The spider silk is a wonderful thing, with branches and leaves, such as cypresses and cypresses, agates, black and white, gold and agate, texture, black and white, and green, and zygote, agate, and brilliance. The fetal agate is the most precious item."
The chemical composition of agate with no tapering patterns is single, namely SiO2 (CeO2), which is called chalcedony. If the chalcedony is mixed with protein or cryptocrystalline particulate quartz during the formation process, a ribbon pattern called agate is formed. Therefore, by virtue of the ribbon pattern can determine what is chalcedony, what is agate. But nowadays people generally equate agate with chalcedony, which is inconsistent with the ancient agate. Strictly speaking, there is no texture pattern, it can not be called agate, only chalcedony. In the "chalcedony" with no ribbon pattern, there are many jade materials. According to the different colors, there are "red chalcedony", "green chalcedony" (also known as Inca stone), "green chalcedony", "blood chalcedony" (also known as blood stone) and "jasper" and so on.
Agate is naturally colored and artificially colored. The natural colors are mainly red, amber, and white. Among them, red is the best. Most of the blue and purple agate jewellery on the market are not natural, they are artificially dyed and fade after a few years.
At present, for the agate, the requirements for the new national standard are not strict, and it is considered as an acceptable quality improvement process method, so it is unnecessary to specify when selling. Agate and chalcedony have a rind, opaque, opaque and variegated. Since the color of natural red agate is mostly not bright, agate and chalcedony generally undergo heat treatment to change color. Generally, agate, which is not natural, such as gray and light color, is dyed red, yellow, and green. Blue, black and other colors. For example, agate and chalcedony containing divalent iron ions can be heat-treated to convert divalent iron ions to trivalent iron ions so that the gray color turns red, from maroon, red sauce to bright red; the egg agate is heat treated. , From the egg blue to white, dyed soft agate color, made out of the jewelry is more beautiful, therefore, the heat treatment of agate has become a common procedure for making jewelry.
Second, texture Because the agate is formed in the molten state of the crystal, particularly dense, Mohs hardness of 6.5 to 7 levels, the surface is more delicate after grinding, with a knife can not be traced, so you do not have to worry about agate jewelry was scratched. True agate rubbed a dozen times on a hard wood board, agate was not hot, and the board was hot.
The fake agate is mostly made of stone, and it is softer than the real agate. The jade can be used to mark the fake agate, but the genuine product is not drawn.
The synthetic agate has a hardness of less than 5 on the Mohs, and can be traced with a knife.
On the surface, real agate is less profane, and fake agate is more.
Some cast glass products have strong glass luster, and the surface has shrinkage and no trace of polishing. Small bubbles can be observed with a magnifying glass, and can be made opaque with orthogonal light under polarized light, so it is completely compatible with agate and chalcedony Differentiate.
Because the glass texture is very brittle and rigid, the structure is arranged to be clear, and the lack of compactness and toughness of jade can not withstand the strong high-speed rotary engraving. Therefore, high relief and round carved jewelry cannot be processed on the glass.
Use a 10x magnifying glass to find out whether there are bubbles or not. If only one is found, you can confirm that it is glass, not jade.
Third, the process quality and high quality of agate production process is strict and advanced, so the surface brightness is good, inlaid firmly, Zhou Zheng, no scratches, cracks.
Fourth, the level of water tank agate is agate in the most precious species, is characterized by a closed hole in the agate, the hole contains water.
The quality of the agate and the assessment of its economic value: beautiful patterns; pure, bright red, blue, purple and pink; good transparency, translucent; no cracks, no sand, no impurities; More than 5 kg are special agate. Those with a weight of about 2-5 kg ​​are grade a agate; those with a weight of about 0.5-2 kg are grade 2 agate; those with a weight of about 0.5 kg or less are grade 3 agate.
Agate carving crafts to block large, as the jewelry cut stone to color the United States is better. The flowers work out with skill and skill, and the prime work is very expensive. The carving techniques are generally divided into two categories: flower work and vegetarian work. Flowers such as flowers, converters, birds, beasts, Shi women's objects; vegetarian works such as rings, bracelets, earrings and so on. When purchasing, it should be comprehensively evaluated in terms of its color, texture, transparency, and craftsmanship.
5. Transparency and Gloss True agate surface is coated with a layer of wax. It is slightly chaotic. Its transparency is not high. It has the luster of wax. Some can see the natural waterline or "cloud". Translucent texture is a glassy luster. . The synthetic agate is transparent and transparent like a glass ball.
Agate has a typical band structure, and the finished edge has a ring of halos.
Some fake agates have a thin layer of organic matter on their surfaces, like a waxy luster, but they don't feel the same way.
6. The proportion of weight agate is 2.65. True agate jewelry is heavier than synthetic agate jewelry. Plastic replicas are light and easy to distinguish.
Seven, the temperature natural agate feel cool, but it feels cool in winter and cool in summer. The synthetic agate changes with the outside temperature, and it gets hotter in the hot days, and it cools in the cool days.
â– Similarities and differences between crystal and agate Although the chemical composition of both crystal and agate is silica, there are some differences between the two. Crystal is a single crystal, a crystal is usually a crystal crystal, and agate is a polycrystalline assembly. Electron microscopy shows that agate is made up of numerous tiny silica crystals, so agate is usually translucent, while crystal is transparent.
â– The difference between agate and chalcedony and similar jade The agate and chalcedony are both cryptocrystalline quartz, and collectively referred to as chalcedony in mineralogy. The gems world has a cryptic crystal block quartz with agate texture. Onyx has a variety of colors in the band strips, if the block without band structure is called chalcedony. The crystal morphology is cryptocrystalline with a granular, fibrous structure. The aggregates are often galenoid, kidney-shaped, tuberculous, and dense. Pure agate and chalcedony are white, because the agate color is rich in pigment ions and impurities, so there are "a thousand kinds of agate million kinds of jade," said the color is red, blue, green, light green, yellow brown, brown, purple , gray, black and other colors, and there are concentric, layered, corrugated, striped patterns. Grease gloss to glass, transparent to translucent. No cleavage, conchoidal fractures, cracks.
Agate and chalcedony can be distinguished according to different colors, bands and other patterns. The chalcedony products are easy to be confused with the Dongling stone, dense jade, and jasper, and can be distinguished based on differences in color, texture, and density. Chalcedony products are bright, cryptocrystalline and delicate in texture. Quartzite particles such as Dongling Stone are coarse, fine grained and relatively coarse in texture. Jade similar to green chalcedony has green jade, turquoise, and celestial stone. Green Jade changes spotted interweave structure, and it can be seen as speckle or fibrous jadeite crystal. Turquoise transparency is poor, porcelain gloss, low hardness, 5-6. Tianhe stone has obvious grid-like stripes.
â– Evaluation and purchase of agate and chalcedony According to the morphological characteristics of agate, it can be divided into the following varieties: Onyx (with agate and cut agate), red agate, moss agate (also known as dendritic agate), Scenic agate (also known as the city agate), fire agate, water agate. The famous Nanjing "flower stone" is a type of agate with a concentric pattern. Agate's evaluation and purchase factors are color, transparency, and blockiness. Process requirements are bright colors, pure, thick color layer; smooth surface, high transparency; decorative uniform, clear, good linearity; fine texture, toughness; no cracks or cracks; large block size. Red and blue are best. Chalcedony varieties: green chalcedony (also known as Australian jade, China also known as Inka stone), thick green chalcedony, Pitt stone, blood chalcedony (also known as bloodstone) and so on. The color of chalcedony is pure and beautiful, and the bigger the block, the better. The quality of green chalcedony and verdant chalcedony is the most precious. Chalcedony is processed into rings, bracelets, necklaces and other jewelry.