Opals
Gemstones
Jewelry
Coins
Voir toutes les photos (9)
Incredible Color 14.50 Ct Incredible Natural Grandidierite Gemstone
- UGS
- Dimensions (mm)
- 18.250 x 15.000 x 8.310mm
- Poids (cts)
- 14.500
- Treatment
- No Treatment
- Taper
- Faceted
- Couleurs
-
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
- UGS
- Dimensions (mm)
- 18.250 x 15.000 x 8.310 mm
- Poids (cts)
- 14.500
- Treatment
- No Treatment
- Taper
- Faceted
- Couleurs
-
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
| Fournisseur d'expédition | Expédition vers :pays | Expédition dans le reste du monde |
|---|---|---|
| Standard Shipping - Tracked | $10.00 / : jours jours | $13.00 / : jours jours |
|
:pays
:fournisseur bénéficie d'une réduction de :prix sur les commandes avec :quantité ou plus d'articles
Reste du monde
:fournisseur bénéficie d'une réduction de :prix sur les commandes avec :quantité ou plus d'articles
|
||
| DHL | $35.00 / : jours jours | $35.00 / : jours jours |
|
:pays
:fournisseur bénéficie d'une réduction de :prix sur les commandes avec :quantité ou plus d'articles
Reste du monde
:fournisseur bénéficie d'une réduction de :prix sur les commandes avec :quantité ou plus d'articles
|
||
-
PositifBeautiful stone and beautiful cut, definitely will buy from again. Shipping took 1 week international to Australia really happy with that time frame
-
Positif
Thank you for the opportunity to buy great gemstones
-
Positif
Beautiful stone, as expected, would buy again
-
Positif
Beautiful stone, a little more white in person, but I'll forgive that
