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NATURAL GRANDIDEIRITE SPECIMEN WITH TOURMALINE CRYSTALS

$445.00 $360.00

Grandidierite is an extremely rare mineral and gem that was first discovered in 1902 in southern Madagascar.

Mohs scale hardness: 7.5

Optical properties: Biaxial (-)

Category: Nesosilicate

Formula: (Mg,Fe2+)Al3(BO3)(SiO4)O2

Crystal system: Orthorhombic

Color: Bluish green

Dispersion: strong

Refractive Index: 1.590 to 1.623

 

Grandidierite have been found in only a few locations around the world, including Malawi, Namibia and Sri Lanka and few gem quality specimens have come mainly from Madagascar.

1 in stock

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 NATURAL GRANDIDEIRITE SPECIMEN WITH TOURMALINE CRYSTALS

Weight : 46.85 Cts

Height : 32 mm

Width : 17 mm

Mineral : Madagascar

Treatment : None (Natural)

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