Benitoite

United States, California (San Benito County), New Idria District (Dallas Gem Mine)

Identifier: 33927
Refractive Index: 1.7800
Specific Gravity: 3.73
Optical Character: Uniaxial +
Pleochroism: Light brown / Dark blue
Luster: Vitreous

SUN

I

F

LED

Absorption Depth

0.1

0.3

0.6

1.0

1.5

2.5

4.0

Absorption Spectrum