Dumortierite 5.02 ct.
Dumortierite 5.02 ct.
Dumortierite
is an Aluminum Boro-Silicate Hydroxide with formula Al6.5 - 7(BO3)(SiO4)3(O, OH)3 and hardness of 7- 8.5 .
This material is rarely transparent,often opaque to translucent and is popular as a stone for carving or cabochon. Mixed with minor quartzite.This gem here is full facet and comes from Brazil.
Size: 13x12.9x6.5 mm.
Weight: 5.02 ct.
CODE#10349