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Aquamarine quality is evaluated from color, clarity, cut and weight. Pure color, no gray, no dichroism, thick and bright color of the highest value. Some aquamarine with directional inclusions can be processed into cat’s eye effect or starlight effect, and aquamarine with special optical effect is more expensive. Aquamarine with the same color, clarity and cut is more valuable if it weighs more.
Aquamarine is a beryllium, aluminum silicate, together with Wulan gemelline,...
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Moonstone is a layered gemstone mineral of orthoclase and Albite. Moonstone is mainly produced in Sri Lanka, Myanmar, India, Brazil, Mexico and the European Alps, of which Sri Lanka produced the most precious.
Moonstone is usually colorless to white, also can be light yellow, orange to light brown, Blue Gray or green, transparent or translucent, with a special moonlight effect, hence the name. This is due to the parallel intergrowth of Lamellar Aphanites of the two feldspar, w...
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Citrine varies in color from yellow to light brown and is easily confused with citrine. The yellow color in citrine is due to the presence of iron oxide in water. Natural citrine is scarce and produced in few places, with only Brazil and Madagascar producing high-quality Citrine in limited quantities. Amethyst and nicotinite are often heated to make them change color and look like citrine, or even fake citrine. Citrine has complete joints, citrine has no joints, and the lowest...
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Yellow sapphire is also known as topaz in business. A variety of yellow gem grade corundum. The color ranges from light yellow to canary yellow, golden yellow, honey yellow and light brown yellow, with golden yellow being the best. Yellow is generally associated with the presence of iron oxide. In addition to topaz, the canary yellow of sapphire is not common in other gemstones. The world’s largest natural yellow sapphire is produced in Sri Lanka. It weighs 46.5 carats. ...
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Cordierite is a silicate mineral, usually light blue or light purple, glassy luster, transparent to translucent. Cordierite also has the characteristic of being remarkably polychromatic (tricolor), emitting light of different colors in different directions. Cordierite is usually cut into traditional shapes, and the most popular color is blue-purple.
Cordierite is similar in color to sapphire, so it is also called water sapphire. Nicknamed the poor man’s sapphire because ...
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Ruby [1] , which means corundum of a red color, is a type of corundum and consists primarily of aluminum oxide (AL 2O 3) . The red color comes from chromium (CR) , mainly Cr2O3, the content is generally 0.1 ~ 3% , the highest is 4% . Containing Fe, Ti and blue said Sapphire, non-chromium CR color of other colors of corundum also collectively known as Sapphire.
Most natural rubies come from Asia (Burma, Thailand, Sri Lanka, Pakistan, China Xinjiang, China Yunnan, etc.) , Africa...
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Amethyst is a tripartite crystal system, the crystal is hexagonal columnar, the cylindrical surface is transverse, there are left shape and right shape, twin-crystal is very common. The hardness is 7. The crystal often contains irregular or winged gas-liquid inclusions. It is one of the most expensive members of the crystal family, because the water crystal contains Mn, Fe3+ and appears purple. Transparent, with obvious polychromatism observed under dichromatic mirror.
The ame...
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Agate is a kind of chalcedony mineral, often mixed with opal and cryptocrystalline quartz banded block, hardness 6.5-7 degrees, specific gravity 2.65, color is quite hierarchical. Having translucency or opacity. Protoform tripartite system. Often dense massive and formed a variety of structures, such as breast, grape, tuberculous and so on, the common concentric circle structure. Chalcedony with different colors, usually green, red, yellow, brown, white and so on. According to...
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Aquamarine quality is evaluated from color, clarity, cut and weight. Pure color, no gray, no dichroism, thick and bright color of the highest value. Some aquamarine with directional inclusions can be processed into cat’s eye effect or starlight effect, and aquamarine with special optical effect is more expensive. Aquamarine with the same color, clarity and cut is more valuable if it weighs more.
Aquamarine is a beryllium, aluminum silicate, together with Wulan gemelline,...
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The color changing Sapphire in Corundum is real, it will appear different colors in different light, also known as color changing corundum or color treasure, the color change is expected to be caused by the chrome element in corundum. It will be grey-blue or violet in sunlight, purple or Magenta in yellow light, bright colors are the best, but unfortunately they generally appear dark, of course, bright colors are also available, the greater the color difference, the more expen...
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Amethyst is a tripartite crystal system, the crystal is hexagonal columnar, the cylindrical surface is transverse, there are left shape and right shape, twin-crystal is very common. The hardness is 7. The crystal often contains irregular or winged gas-liquid inclusions. It is one of the most expensive members of the crystal family, because the water crystal contains Mn, Fe3+ and appears purple. Transparent, with obvious polychromatism observed under dichromatic mirror.
The ame...
Product Detail:
Amethyst is a tripartite crystal system, the crystal is hexagonal columnar, the cylindrical surface is transverse, there are left shape and right shape, twin-crystal is very common. The hardness is 7. The crystal often contains irregular or winged gas-liquid inclusions. It is one of the most expensive members of the crystal family, because the water crystal contains Mn, Fe3+ and appears purple. Transparent, with obvious polychromatism observed under dichromatic mirror.
The ame...