$44.00 USD
价格

2.99 Cts Top color Natural Opal Gemstone

存货单位
OP 77
尺寸(毫米)
14.500 x 7.700 x 5.100mm
重量 (cts)
2.990
类型
Faceted
Shape
Oval
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.

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Standard Shipping - Tracked $14.00 / :几天天 $16.00 / :几天天
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Standard Shipping - Tracked 对包含 2 或更多商品的订单折扣为 $20.00
世界其他地区
Standard Shipping - Tracked 对包含 2 或更多商品的订单折扣为 $25.00
FedEx $42.00 / :几天天 $42.00 / :几天天
:国家
FedEx 对包含 2 或更多商品的订单折扣为 $55.00
世界其他地区
FedEx 对包含 2 或更多商品的订单折扣为 $55.00

jemscollection
jemscollection
We are suppliers of good quality precious and semiprecious gemstones. Our direct access to the mines in different parts of the world provide us the opportunity to provide best quality at competitive prices to our valued customers.
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送货细节

船运:
$16.00 :通过 Standard Shipping - Tracked 计算天数
发货自:
Thailand

付款方式

  • paypal

概述

列表类型 : Standard
产品编号 : 1986011
开始 : 15th November 2024 11:30 pm PST
* 所有价格均以:货币为单位