9.87 CTS 'CATS EYES' GREEN OPALITE - IRIDESENT [VS6192]
- 存货单位
- 尺寸(毫米)
- x x mm
- 重量 (cts)
- 颜色
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CATS EYE OPAL
This is a green natural untreated stone from Brazil showing chatoyance [cats eye] effect.We have selected this piece as it has a strong cats eye effect.
Hardness mohs scale 5.5 to 6.5
Well polished
High domed
Weight 9.87 cts app
size 19 x 17 x 7 mm app
Chatoyancy or chatoyance, is an optical reflectance effect seen in certain gemstones Coined from the French "oeil de chat", meaning "cat's eye", chatoyancy arises either from the fibrous structure of a material, as in tiger eyequartz, or from fibrous inclusions or cavities within the stone, as in cat's eye chrysoberyl. The effect can be likened to the sheen off a spool of silk: the luminous streak of reflected light is always perpendicular to the direction of the fibres. For a gemstone to show this effect best it must be cut en cabochon, with the fibers or fibrous structures parallel to the base of the finished stone. Faceted stones are less likely to show the effect well.
Cats Eye Opal was formed app 15 to 30 million years ago, during the tertiary period. Starting out as a liquid it seeped through sedimentary layers of earth, settling within impervious clays at a depth of 20 to 30 metres. Over the coarse of millions of years, the liquid slurry crystalized, becoming catseye opal.
Cats-Eye Opalite is a rare chatoyant form of Opal. The attribute that gives this stone its popularity and name is the phenomena known as chatoyancy, also known in the gem trade as “the cat's eye effect”. The reason for this fascinating phenomenon is very fine inclusions within the stone. When a light source is directed on these inclusions it creates a bright strip that appears and runs perpendicular to the inclusions. This strip will then glide across the surface of the stone when turned over. This natural gemstone is found only in Tanzania. Opalite Cats Eye is best known for it's creamy honey color and strong cats-eye effect. Opalite Cats Eye can also occur in shades of yellow, red, white and black.
The physical structure of Opalite Cats Eye is unique. Tiny spheres of silicon dioxide form a pyramid shaped grid interspersed with water. Tiny natural faults in this grid cause the characteristic "play of color". The effect is similar to the rainbow colors displayed on a soap bubble, only much more dramatic. The incredible play of color is exhibited by the gemstone due to the presence of small spheres in the silica gel that causes interference and refraction appearance. Silicon and oxygen chains are packed in the spheres and these are uneven in size and incoherent in concentration. These are set in a compact structures thus, when ray of light falls it dissects the light on its way through the stone resulting in the awesome color play. As per the size of the spheres within the structure, changeable colors of the gamut are diffracted. With the increase in the consistency of the spheres position, more intense and brilliant would be the color play.
- 存货单位
- 尺寸(毫米)
- x x mm
- 重量 (cts)
- 颜色
-
CATS EYE OPAL
This is a green natural untreated stone from Brazil showing chatoyance [cats eye] effect.We have selected this piece as it has a strong cats eye effect.
Hardness mohs scale 5.5 to 6.5
Well polished
High domed
Weight 9.87 cts app
size 19 x 17 x 7 mm app
Chatoyancy or chatoyance, is an optical reflectance effect seen in certain gemstones Coined from the French "oeil de chat", meaning "cat's eye", chatoyancy arises either from the fibrous structure of a material, as in tiger eyequartz, or from fibrous inclusions or cavities within the stone, as in cat's eye chrysoberyl. The effect can be likened to the sheen off a spool of silk: the luminous streak of reflected light is always perpendicular to the direction of the fibres. For a gemstone to show this effect best it must be cut en cabochon, with the fibers or fibrous structures parallel to the base of the finished stone. Faceted stones are less likely to show the effect well.
Cats Eye Opal was formed app 15 to 30 million years ago, during the tertiary period. Starting out as a liquid it seeped through sedimentary layers of earth, settling within impervious clays at a depth of 20 to 30 metres. Over the coarse of millions of years, the liquid slurry crystalized, becoming catseye opal.
Cats-Eye Opalite is a rare chatoyant form of Opal. The attribute that gives this stone its popularity and name is the phenomena known as chatoyancy, also known in the gem trade as “the cat's eye effect”. The reason for this fascinating phenomenon is very fine inclusions within the stone. When a light source is directed on these inclusions it creates a bright strip that appears and runs perpendicular to the inclusions. This strip will then glide across the surface of the stone when turned over. This natural gemstone is found only in Tanzania. Opalite Cats Eye is best known for it's creamy honey color and strong cats-eye effect. Opalite Cats Eye can also occur in shades of yellow, red, white and black.
The physical structure of Opalite Cats Eye is unique. Tiny spheres of silicon dioxide form a pyramid shaped grid interspersed with water. Tiny natural faults in this grid cause the characteristic "play of color". The effect is similar to the rainbow colors displayed on a soap bubble, only much more dramatic. The incredible play of color is exhibited by the gemstone due to the presence of small spheres in the silica gel that causes interference and refraction appearance. Silicon and oxygen chains are packed in the spheres and these are uneven in size and incoherent in concentration. These are set in a compact structures thus, when ray of light falls it dissects the light on its way through the stone resulting in the awesome color play. As per the size of the spheres within the structure, changeable colors of the gamut are diffracted. With the increase in the consistency of the spheres position, more intense and brilliant would be the color play.
运输商 | 运送至:国家 | 运送到世界其他地区 |
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FedEx | $12.00 / :几天天 | $39.00 / :几天天 |
:国家
FedEx 对包含 2 或更多商品的订单折扣为 $12.00
世界其他地区
FedEx 对包含 2 或更多商品的订单折扣为 $39.00
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||
Registered Shipping | $9.00 / :几天天 | $16.00 / :几天天 |
:国家
Registered Shipping 对包含 2 或更多商品的订单折扣为 $9.00
世界其他地区
Registered Shipping 对包含 2 或更多商品的订单折扣为 $16.00
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积极的
Good seller.
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积极的
The stone was more beautiful in person than in the photos. It arrived very quickly. I would definitely recommend this seller and would buy from him again.
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积极的
Always a pleasure to deal with you! Thanks for fast shipping :)
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积极的
Lovely stuff! Thanks!
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积极的
Absolutely stunning multi-colored fire skitters across the surface as if the stone were alive. One of the most beautiful pieces of boulder opal I've ever purchased. Extremely pleased! Thanks!!!
审计
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描述准确
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图片准确