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Bronzite
Bronzite

Petalite
Petalite



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1 Optical Properties
1.1 Luster
Not Available
Vitreous, Pearly
1.2 Pleochroism
Not Available
AbsentWalter Schumann
1.3 Dispersion
NA0.01
Fluorite Optical Properties
0.007 1
1.5 Transparency
Transparent, Translucent
Gemmological Tables (2004) More from other references
1.6 Refractive Index
1.6681.502-1.523
Agate Opal
1 3.25
1.10 Optic Character
Not Available
Not Available
1.11 Crystal System
Orthorhombic
monoclinic
1.12 Birefringence
0.0140.012-0.016
Achroite
0 0.296
1.14 Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda