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Amethyst
Amethyst

Unakite
Unakite



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Amethyst
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1 Optical Properties
1.1 Luster
Vitreous
Not Available
1.2 Pleochroism
None
Not Available
1.3 Dispersion
0.01NA
Fluorite Optical Properties
0.007 1
1.8 Transparency
Transparent, Transparent to translucent
Gemstones of the world (2001)
1.9 Refractive Index
1.544-1.5531.525
Agate Opal
1 3.25
1.10 Optic Character
Not Available
Not Available
1.12 Crystal System
Trigonal
monoclinic
1.13 Birefringence
0.009Not Available
Achroite
0 0.296
1.20 Clarity
Transparent
Gemstones of the world (2001)