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3.25 Cts Top color Natural Opal Gemstone
- 存货单位
- OP 87
- 尺寸(毫米)
- 12.000 x 10.600 x 5.800mm
- 重量 (cts)
- 3.250
- 类型
- Faceted
- 颜色
-
combine shipment period is only 3 days from first purchase if a buyer not pay items will be canceled after 3 days .
Gemstone : Natural Opal
Treatment: Not Heated. Not Treated. Not Enhanced.
Opal is a hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. Because of its amorphous character, it is classed as a mineraloid, unlike crystalline forms of silica, which are classed as minerals. It is deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt.
The name opal is believed to be derived from the Sanskrit word upala (उपल), which means 'jewel', and later the Greek derivative opállios (ὀπάλλιος), which means 'to see a change in color'.
There are two broad classes of opal: precious and common. Precious opal displays play-of-color (iridescence); common opal does not.[5] Play-of-color is defined as "a pseudo chromatic optical effect resulting in flashes of colored light from certain minerals, as they are turned in white light."[6] The internal structure of precious opal causes it to diffract light, resulting in play-of-color. Depending on the conditions in which it formed, opal may be transparent, translucent, or opaque, and the background color may be white, black, or nearly any color of the visual spectrum. Black opal is considered the rarest, while white, gray, and green opals are the most common.
- 存货单位
- OP 87
- 尺寸(毫米)
- 12.000 x 10.600 x 5.800 mm
- 重量 (cts)
- 3.250
- 类型
- Faceted
- 颜色
-
combine shipment period is only 3 days from first purchase if a buyer not pay items will be canceled after 3 days .
Gemstone : Natural Opal
Treatment: Not Heated. Not Treated. Not Enhanced.
Opal is a hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. Because of its amorphous character, it is classed as a mineraloid, unlike crystalline forms of silica, which are classed as minerals. It is deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt.
The name opal is believed to be derived from the Sanskrit word upala (उपल), which means 'jewel', and later the Greek derivative opállios (ὀπάλλιος), which means 'to see a change in color'.
There are two broad classes of opal: precious and common. Precious opal displays play-of-color (iridescence); common opal does not.[5] Play-of-color is defined as "a pseudo chromatic optical effect resulting in flashes of colored light from certain minerals, as they are turned in white light."[6] The internal structure of precious opal causes it to diffract light, resulting in play-of-color. Depending on the conditions in which it formed, opal may be transparent, translucent, or opaque, and the background color may be white, black, or nearly any color of the visual spectrum. Black opal is considered the rarest, while white, gray, and green opals are the most common.
运输商 | 运送至:国家 | 运送到世界其他地区 |
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Standard Shipping - Tracked | $10.00 / :几天天 | $14.00 / :几天天 |
:国家
Standard Shipping - Tracked 对包含 2 或更多商品的订单折扣为 $15.00
世界其他地区
Standard Shipping - Tracked 对包含 2 或更多商品的订单折扣为 $20.00
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FedEx | $35.00 / :几天天 | $35.00 / :几天天 |
:国家
FedEx 对包含 2 或更多商品的订单折扣为 $40.00
世界其他地区
FedEx 对包含 2 或更多商品的订单折扣为 $40.00
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积极的
Beautiful citrine. Thank you!