is an Lithium Aluminosilicate with formula: LiAlSi4O10 and hardness of 6-6.5 from the mohs scale
Most faceted petalites are colorless, also yellowish, greenish ,pinks and reddish; quite rare in large sizes if they free of inclusions.. This material comes form Arassuahì mine, Minas Gerais, Brazil.
Also called angel stone.Eye clean.
Weight: 16.39 ct.