1 Optical Properties
1.1 Luster
1.2 Pleochroism
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
Strong
1.3 Dispersion
2.5 Transparency
Translucent
Gemmological Tables (2004) More from other references
2.6 Refractive Index
1.678-1.7581.656-1.704
1
3.25
2.10 Optic Character
2.11 Crystal System
2.12 Birefringence
3.4 Clarity
Translucent
TransparentUlrich Henn and Claudio C. Milisenda