Hydrogrossular garnet 19.96 ct.

Hydrogrossular is a type of garnet with formula : Ca3Al2(SiO4)3-x(OH)4 and hardness of 7. Occur in various colors: the most common is green,but also grey,lavender and pink.As far as I know is never transparent ,always opaque to translucent.Also called "transwaal jade" is generally cut in cabochons or carved.The small black inclusions are chromite.From South Africa. Size: 37.4x11.3x5 mm. Weight: 19.96 ct,. CODE# 2446