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Beudantite
Beudantite

Dravite
Dravite



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Beudantite
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Dravite

Beudantite and Dravite Optical Properties

Optical Properties

Luster

Vitreous, Resinous
Vitreous

Pleochroism

visible
Very strong: pale yellow colorless

Dispersion

0.030.02
0.005 1
👆🏻

Transparency

-
Transparent

Refractive Index

1.9571.614-1.666
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

0.0140.014-0.032
0 0.296
👆🏻

Clarity

-
Transparent

Beudantite and Dravite Optic Character

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

Beudantite and Dravite Transparency

Similar to their colors, Beudantite 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, Beudantite is while Beudantite is in appearance.