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Dravite and Variscite Optical Properties


Variscite and Dravite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Waxy   

Pleochroism
Very strong: pale yellow colorless   
MissingWalter Schumann   

Dispersion
0.02   
22
Not Available   

Transparency
Transparent   
Translucent, Opaque . May be translucent when backlit on the edges.   

Refractive Index
1.614-1.666   
1.560-1.594   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m   
Orthorhombic   

Birefringence
0.014-0.032   
0.031   

Clarity
Transparent   
Translucent   

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Dravite and Variscite Optic Character

Dravite and Variscite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Dravite and Variscite 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 Variscite 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.

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Dravite and Variscite Transparency

Similar to their colors, Dravite and Variscite 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.

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