Sponsoredⓘ
Sodalite
Gemstone
Sodalite is a tectosilicate mineral with the formula Na
₈Cl
₂, with royal blue varieties widely used as an ornamental gemstone. Although massive sodalite samples are opaque, crystals are usually transparent to translucent. Sodalite is a member of... Wikipedia
Formula: Na 8(Al 6Si 6O 24)Cl 2
Chemical formula: Na₈Al₆Si₆O₂₄ Cl₂
Hardness (Mohs hardness scale): 5.5 – 6
Category: Tectosilicates without zeolitic H2O
Cleavage: Poor on