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Dravite
Dravite

Brucite
Brucite



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Dravite
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Brucite

Dravite and Brucite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Pearly

Pleochroism

Very strong: pale yellow colorless
-

Dispersion

0.020.03
0.005 1
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Transparency

Transparent
TransparentMichael O’Donoghue

Refractive Index

1.614-1.6661.56-1.60
1 3.25
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Optic Character

-
-

Crystal System

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

Birefringence

0.014-0.0320.010-0.020
0 0.296
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Clarity

Transparent
TransparentMichael O’Donoghue

Dravite and Brucite Optic Character

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

Similar to their colors, Dravite and Brucite 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.