Sugilite is a purple manganese-bearing cyclosilicate. Gem material is usually massive rather than crystalline. It is hard enough for beads and cabochons.
This page is only for Sugilite. Comments below are for this material.
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Sugilite
Specimen Details
- Hardness (Mohs): 6–6.5
- Chemical Formula: KNa2(Fe,Mn,Al)2Li3Si12O30
- Crystal System: Hexagonal
- Size: Specimen size varies; record the piece, not the species