Benitoite
ID: 121
Benitoite
Chemical Formula
BaTiSi3O9
Hardness (Mohs)
6-6.5
Crystal System
Hexagonal
Streak
White
Luster
Vitreous to sub-adamantine
Diaphaneity
Transparent to translucent
Color
Blue, violet-blue, rarely white or colorless
Crystal Habit / Mode of Occurrence
Ditrigonal-dipyramidal crystals, typically flattened and wedge-shaped
Fun Facts
Benitoite is the state gemstone of California and fluoresces blue under shortwave UV light.