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Boleite
Boleite

Dravite
Dravite



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Boleite
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Dravite

Boleite and Dravite Optical Properties

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Optical Properties

Luster

Vitreous, Pearly
Vitreous

Pleochroism

-
Very strong: pale yellow colorless

Dispersion

0.070.02
0.005 1
👆🏻

Transparency

Transparent
Transparent

Refractive Index

2.051.614-1.666
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

0.0100.014-0.032
0 0.296
👆🏻

Clarity

Transparent
Transparent

Boleite and Dravite Optic Character

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

Boleite and Dravite Transparency

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