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Dravite
Dravite

Beudantite
Beudantite



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Dravite
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Beudantite

Dravite and Beudantite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Resinous

Pleochroism

Very strong: pale yellow colorless
visible

Dispersion

0.020.03
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.614-1.6661.957
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

0.014-0.0320.014
0 0.296
👆🏻

Clarity

Transparent
-

Dravite and Beudantite Optic Character

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

Similar to their colors, Dravite and Beudantite 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.