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$307.00 USD
價格

20.45 Cts Top color Natural Opal Gemstone

存貨單位
OP 78
尺寸(毫米)
20.140 x 18.320 x 12.760mm
重量 (cts)
20.450
Treatment
No Treatment
類型
Faceted
顏色

We providing combine shipping for all of my customer

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 對包含 2 或更多商品的訂單折扣為 $20.00
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Standard Shipping - Tracked 對包含 2 或更多商品的訂單折扣為 $25.00
FedEx $42.00 / :幾天天 $42.00 / :幾天天
:國家
FedEx 對包含 2 或更多商品的訂單折扣為 $55.00
世界其他地區
FedEx 對包含 2 或更多商品的訂單折扣為 $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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已驗證
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審計

Gemstone Sheriff計劃允許我們的會員請求對任何產品進行審核,該審核由獨立的 Gemologist 人員完成,該資格人員評估商品描述和圖片的準確性。

送貨細節

船運:
$16.00 :通過 Standard Shipping - Tracked 計算天數
發貨自:
Thailand

付款方式

  • paypal

概述

列表類型 : Standard
產品編號 : 1920570
開始 : 2nd November 2024 01:13 am PDT
* 所有價格均以:貨幣為單位