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Dravite
Dravite

Ulexite
Ulexite



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Dravite
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Ulexite

Dravite and Ulexite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Not Available
1.2 Pleochroism
Very strong: pale yellow colorless
AbsentWalter Schumann
1.3 Dispersion
Albite Optical ..
0.02
Rank: 22 (Overall)
None
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Transparent
Transparent
1.5 Refractive Index
1.614-1.666
1.491-1.520
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Not Available
1.8 Birefringence
0.014-0.032
0.029
1.9 Clarity
Transparent
Transparent

Dravite and Ulexite Optic Character

Dravite and Ulexite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Dravite and Ulexite Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Dravite and Ulexite optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

Dravite and Ulexite Transparency

Similar to their colors, Dravite and Ulexite transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Dravite is Transparent while Dravite is Transparent in appearance.