7.45 Ct Incredible Natural Grandidierite Gemstone

Item Information

Dimensions (mm) 13.4 x 12.3 x 6.74mm
Weight (carats) 7.45 carats
Colors

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


$350.00 USD

$700.00 SAVE $350
Add to Cart Make an Offer
Shipping $8.00
21 Days via Standard Shipping - Tracked
Add to Watch List Ask a Question * All prices in USD

Audit Information

The Gemstone Sheriff program allows our members to request an audit on any auction, which is completed by an independent Gemologist who assesses the accuracy of the item description and pictures.

Request Audit

Pricing & Details

Auction ID 993313
Watchers 1 watching
Viewed 23 times
Starts 31st Aug 2019 5:09am PDT

Shipping & Insurance

Provider Shipping Transit
DHL $25.00 10 Days
Standard Shipping - Tracked $8.00 21 Days
Shipping Insurance all providers $0.00 (optional)

About Mineralscollection