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Selenite
Selenite

Astrophyllite
Astrophyllite



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X
Selenite
X
Astrophyllite
1 Optical Properties
1.1 Luster
Vitreous
Greasy, Pearly
1.2 Pleochroism
Not Available
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
2.5 Transparency
Transparent
Translucent
2.7 Refractive Index
Not Available1.678-1.758
Agate Opal
1 3.25
2.10 Optic Character
Not Available
Not Available
2.11 Crystal System
monoclinic
Triclinic
2.12 Birefringence
Not Available0.050
Achroite
0 0.296
3.4 Clarity
Transparent
Translucent