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Tremolite
Tremolite

Dravite
Dravite



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Tremolite
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Dravite

Tremolite and Dravite Optical Properties

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Optical Properties

Luster

Vitreous, Silky
Vitreous

Pleochroism

-
Very strong: pale yellow colorless

Dispersion

0.020.02
0.005 1
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Transparency

Transparent
Transparent

Refractive Index

1.599-1.6371.614-1.666
1 3.25
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Optic Character

-
-

Crystal System

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

Birefringence

0.023-0.0280.014-0.032
0 0.296
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Clarity

Transparent
Transparent

Tremolite and Dravite Optic Character

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

Tremolite and Dravite Transparency

Similar to their colors, Tremolite 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, Tremolite is Transparent while Tremolite is Transparent in appearance.