100% Natural - Not treated in any way.
Rare Collectors Gem !
Suitable for Museums,Institutions and Students of Gemology.
Gem with High Luster and Good Clarity.
Large Sizes are Extremely Rare!
A Gem of Lasting Beauty.
Refractive Index: 1.66 – 1.71
Chemical Comp: MgAlBO4
Crystal Group: Orthorhombic
Sinhalite was identified as a separate gem mineral in 1952 and Sri Lanka is a major source of this gem.This gem is popular with collectors, belongs to the Orthorhombic Crystal group with strong pleochroism varying from greenish brown to dark brown. A highly lustrous gem.