Benitoite is barium titanium silicate, the state gem of California. Crystals are blue and triangular in outline. It fluoresces bright blue under shortwave ultraviolet light.
This page is only for Benitoite. Comments below are for this material.
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Benitoite
Specimen Details
- Hardness (Mohs): 6–6.5
- Chemical Formula: BaTiSi3O9
- Crystal System: Hexagonal
- Size: Specimen size varies; record the piece, not the species