Opals
Gemstones
Jewelry
Coins
No Reserve Gemstones
No Reserve Opals
No Reserve Jewelry
No Reserve Coins
View All Photos (8)
You have not bid on this auction.
19.60 Ct Incredible Color Natural Grandidierite Gemstone
- SKU
- Dimensions (mm)
- 18.380 x 17.150 x 9.880mm
- Weight (cts)
- 19.600
- Treatment
- No Treatment
- Type
- Faceted
- Colours
-
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
- SKU
- Dimensions (mm)
- 18.380 x 17.150 x 9.880 mm
- Weight (cts)
- 19.600
- Treatment
- No Treatment
- Type
- Faceted
- Colours
-
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
| Shipping provider | Shipping to Thailand | Shipping to rest of world |
|---|---|---|
| Standard Shipping - Tracked | $15.00 / 7 days | $15.00 / 30 days |
|
Thailand
Standard Shipping - Tracked is discounted to $15.00 on orders with 5 or more items
Rest of the world
Standard Shipping - Tracked is discounted to $20.00 on orders with 3 or more items
|
||
| DHL | $30.00 / 6 days | $30.00 / 6 days |
|
Thailand
DHL is discounted to $30.00 on orders with 4 or more items
Rest of the world
DHL is discounted to $30.00 on orders with 4 or more items
|
||
-
Positivereceived today 12/12, gorgeous stone
-
Positive
Fast shipment, beautiful gem, many thanks
-
Positive
Paid and shipped - no feedback left after 100 days
-
Positive
Paid and shipped - no feedback left after 100 days
-
Positive
Paid and shipped - no feedback left after 100 days
Why are users outbidding themselves?
When a bid is placed, this is the maximum amount a user is willing to bid for the product. Our system will then automatically bid on that users behalf, incrementally increasing the bid to maintain their position as the highest bidder, up to the specified maximum.
When there is an icon indicating 'Auto Bid,' it means our system is actively placing bids for the user based on their maximum bid. This may appear as if users are outbidding themselves, but it's simply a result of the system updating the bid to reflect the users maximum limit.
