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Sylvite
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Alexandrite
Sylvite
Alexandrite
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Summary
Astrology
Physical Properties
Optical Properties
Benefits
All
1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
Visible in colored crystals
Not Available
1.3 Dispersion
NA
NA
Fluorite Optical Properties
▶
⊕
0.007
1
1.13 Transparency
Not Available
Transparent, Transparent to nearly opaque
1.14 Refractive Index
1.4903
1.739-1.770
Agate Opal
▶
⊕
1
3.25
2.5 Optic Character
Not Available
Biaxial/+
2.6 Crystal System
Isometric
Orthorhombic
2.7 Birefringence
Not Available
0.007-0.010
Achroite
▶
⊕
0
0.296
3.4 Clarity
Not Available
Transparent
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