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價格

Incredible Color 5.75 Ct Incredible Natural Grandidierite Gemstone

存貨單位
尺寸(毫米)
13.080 x 11.000 x 6.230mm
重量 (cts)
5.750
Treatment
No Treatment
類型
Faceted
顏色

Grandidierite was first discovered in 1902 in Madagascar by Alfred Lacroix, a French mineralogist. Lacroix named the mineral in honor of French explorer and naturalist Alfred Grandidier (1836–1912), the first authority on the natural history of Madagascar.

Since its initial discovery, samples of Grandidierite have been found in only a few locations around the world, including Malawi, Namibia and Sri Lanka. But the few gem quality specimens have come mainly from Madagascar.

Gem-quality Grandidierite is extremely rare, and it often appears on the list of the 10 rarest varieties in the world, along with gems like jeremejevite, painite, benitoite and taafeite.

Gemologically, Grandidierite is a magnesium aluminum borosilicate. It has a hardness of 7 to 7.5 on the Mohs scale, similar to garnet; a density of 2.85 to 3.00, in the approximate range of tourmaline; and a refractive index of 1.590-1.623.

Name: GRANDIDIERITE GEMSTONE

Place of Origin: MADAGASCAR

TREATMENT: NATURAL



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發貨自:
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概述

列表類型 : Standard
產品編號 : 2122171
開始 : 12th November 2024 12:59 am PST
* 所有價格均以:貨幣為單位