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Tavorite
Tavorite

Dravite
Dravite



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Tavorite
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Dravite

Tavorite and Dravite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Yellow-green colorlessAnthony et al
Very strong: pale yellow colorless

Dispersion

0.020.02
0.005 1
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Transparency

Transparent
Transparent

Refractive Index

11.614-1.666
1 3.25
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Optic Character

-
-

Crystal System

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

Birefringence

-99990.014-0.032
0 0.296
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Clarity

Transparent
Transparent

Tavorite and Dravite Optic Character

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

Tavorite and Dravite Transparency

Similar to their colors, Tavorite and Dravite 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, Tavorite is Transparent while Tavorite is Transparent in appearance.