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$61.00
當前出價
1
出價
關閉
03/05/2020 04:13 pm
1
1708
1

0.67 ct Natural N8 Rough Orange/Red fire flash lightning ridge Australian o

存貨單位
尺寸(毫米)
6.540 x 6.290 x 2.260mm
重量 (cts)
0.670
Body Tone
N8
類型
Cabochon
顏色

Stone Details:

Weight: 0.67cts
Color: Orange/Red
Base Color: N8 Rough
Measurements: 6.54*6.29*2.26mm
Cut: Good / Very Good
Finish & Polish: Very Good
Treatment/Enhancement: None
Origin: Lightning Ridge Australia


The following is courtesy of Wikipedia:

Lightning Ridge in New South Wales, is the main source of black opal, opal containing a predominantly dark background (dark-gray to blue-black displaying the play of color).

Precious opal shows a variable interplay of internal colors and even though it is a mineraloid, it has an internal structure. At micro scales precious opal is composed of silica spheres some 150 to 300 nm in diameter in a hexagonal or cubic close-packed lattice. These ordered silica spheres produce the internal colors by causing the interference and diffraction of light passing through the microstructure of the opal.[7] It is the regularity of the sizes and the packing of these spheres that determines the quality of precious opal. Where the distance between the regularly packed planes of spheres is approximately half the wavelength of a component of visible light, the light of that wavelength may be subject to diffraction from the grating created by the stacked planes. The spacing between the planes and the orientation of planes with respect to the incident light determines the colors observed. The process can be described by Bragg's Law of diffraction.

Visible light of diffracted wavelengths cannot pass through large thicknesses of the opal. This is the basis of the optical band gap in a photonic crystal, of which opal is the best known natural example. In addition, microfractures may be filled with secondary silica and form thin lamellae inside the opal during solidification. The term opalescence is commonly and erroneously used to describe this unique and beautiful phenomenon, which is correctly termed play of color. Contrarily, opalescence is correctly applied to the milky, turbid appearance of common or potch opal. Potch does not show a play of color.


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skyjems
skyjems
Hi everyone, thanks for taking the time to find out a bit more about myself and Skyjems. My name is David Saad, I am the proprietor of this fine gemstone store/site :) I think that the most important thing you should know is that I am a complete gem junkie and nerd! I love gems and truthfully, the only reason I sell gems, is so I can buy more gems! :)
:城市,國家
已驗證
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  • guest235833
    guest235833
    積極的

    Paid and shipped - no feedback left after 100 days

  • tsiropoulos
    tsiropoulos
    積極的

    Opals Received in good order, Excellent service, and exact picture to actual items.

  • anindita
    anindita
    積極的

    Paid and shipped - no feedback left after 100 days

  • gravity
    gravity
    積極的

    wonderful and colorful opal, nice cut, smooth polish, fire is in big pops and very green

  • gravity
    gravity
    積極的

    wonderful color and fire, small crack in top as pictured. lovely stone, nice smooth polish

  • rena1972
    rena1972
    積極的

    Paid and shipped - no feedback left after 100 days

投標歷史 (1)
guest235833
之前從該賣家購買過
4 years ago
$60.00

為什麼用戶出價高於自己?

出價時,這是用戶願意為產品出價的最高金額。然後,我們的系統將代表該用戶自動出價,逐步提高出價以保持其作為最高出價者的地位,直至達到指定的最高價。

當出現“自動出價”圖標時,表示我們的系統正在根據用戶的最高出價主動為用戶出價。這可能看起來好像用戶出價高於自己,但這只是系統更新出價以反映用戶最高限額的結果。

審計

Opal 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:
$6.00 :通過 Standard Shipping - Untracked 計算天數
發貨自:
Canada

付款方式

  • paypal
該賣家在 Canada 的交易中添加 13.00% 稅。

概述

列表類型 : Standard
產品編號 : 856442
起拍價 : $60
開始 : 30th April 2020 02:55 am PDT
結束 : 3rd May 2020 04:13 pm PDT
* 所有價格均以:貨幣為單位