Tourmaline

Elbaite

Namibia, Erongo Region (Karibib District), Otjimbingwe (Otjimbingwe Mine)

Identifier: 34724
Refractive Index: 1.6350
Specific Gravity: 3.15
Optical Character: Uniaxial −
Pleochroism: Greenish yellow / Brownish orange
Luster: Vitreous

SUN

I

F

LED

Absorption Depth

0.1

0.3

0.6

1.0

1.5

2.5

4.0

Absorption Spectrum