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Ammolite
Ammolite

Dravite
Dravite



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1 Optical Properties
1.2 Luster
Silky, Vitreous
Vitreous
1.5 Pleochroism
None
Very strong: pale yellow colorless
1.10 Dispersion
NA0.02
Fluorite Optical Properties
0.007 1
1.18 Transparency
Not Available
Transparent
1.19 Refractive Index
1.520-1.6701.614-1.666
Agate Opal
1 3.25
1.20 Optic Character
Not Available
Not Available
1.21 Crystal System
Trigonal
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
1.22 Birefringence
0.135-0.1450.014-0.032
Achroite
0 0.296
1.23 Clarity
Not Available
Transparent