Grandidierita 4ct
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  • Grandidierita 4ct
  • Grandidierita 4ct
  • Grandidierita 4ct
  • Grandidierita 4ct
  • Grandidierita 4ct
  • Grandidierita 4ct

Grandidierite 4ct

€240.00
Tax included
Product Details
GEM TYPE: Grandidierite
TOTAL WEIGHT: 4ct
SIZE : (LxWxH): 11.5x5.6mm
SHAPE: Round
COLOR: Blue
HARDNESS: 7.5
ORIGIN: Madagascar
TREATMENT: Unheated / Untreated
Quantity
In Stock

Grandidierite
Grandidierite is a very rare mineral that was first discovered in southern Madagascar in the early 20th century. As Grandidierite is quite hard, the high quality material has been cut as gems, making it one of the rarest gems.
Gemologically, grandidierite is a magnesium aluminum borosilicate. It has a hardness of 7 to 7.5 on the Mohs scale, similar to garnet, and a refractive index of 1.590-1.623.
It forms in the orthorhombic crystal system. Grandidierite is typically bluish-green in color and derives its distinctive color from traces of iron. The gemological material is translucent to transparent. Completely transparent samples are absolutely rare.
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1 Item