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$280.00 USD
Price
Closed
03/12/2022 05:13 am

16 cts Grandidierite Loose Gemstone Lot

979
6

SKU
Dimensions (mm)
15.000 x 11.000 x 5.000mm
Weight (cts)
16.250
Treatment
No Treatment
Colours

Natural Grandidierite


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.


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Standard Shipping - Tracked $20.00 / 18 days $16.00 / 25 days
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Standard Shipping - Tracked is discounted to $15.00 on orders with 2 or more items
Rest of the world
Standard Shipping - Tracked is discounted to $10.00 on orders with 2 or more items
Express Shipping $30.00 / 14 days $32.00 / 15 days
Thailand
Express Shipping is discounted to $25.00 on orders with 2 or more items
Rest of the world
Express Shipping is discounted to $25.00 on orders with 2 or more items

royaalstones
royaalstones
20% discount on all our items for limited time
Bangkok, Thailand
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20%
Coupon code GR20
Valid Until
31st Dec 2024

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Shipping Details

Shipping:
$16.00 25 days via Standard Shipping - Tracked
Ships from:
Thailand

Payment Options

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Overview

Listing Type : Standard
Product ID : 1415719
Starts : 28th November 2022 08:53 am PST
* All prices are in USD