Description
Biotite (Birth Stone), from Freita Mountain, Arouca, Aveiro, Portugal. Comes with certificate of authenticity. Average weight (Carats): 502.5 carats. Dimensions (mm): 65 x 58 x 20 mm. Ref. : SKU046364. Biotite is a mineral from the silicate group, a subgroup of phyllosilicates of the micas family. Color: dark green, brown or black.
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