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Opal
Opal

Imperial Topaz
Imperial Topaz



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Opal
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Imperial Topaz
1 Optical Properties
1.2 Luster
Vitreous, Pearly
Not Available
1.3 Pleochroism
None
Not Available
1.4 Dispersion
None0.01
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent, Transparent to translucent
Transparent
1.5 Refractive Index
1.37-1.521.609-1.643
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Not Available
1.8 Birefringence
Not AvailableNot Available
Achroite
0 0.296
1.11 Clarity
Transparent
Not Available