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Mimetite
Mimetite

Dravite
Dravite



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Mimetite
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Dravite

Mimetite and Dravite Optical Properties

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Optical Properties

Luster

Resinous, Subadamantine
Vitreous

Pleochroism

Weak
Very strong: pale yellow colorless

Dispersion

0.040.02
0.005 1
👆🏻

Transparency

Translucent
Transparent

Refractive Index

2.106-2.2631.614-1.666
1 3.25
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Optic Character

-
-

Crystal System

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

Birefringence

0.0190.014-0.032
0 0.296
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Clarity

Translucent
Transparent

Mimetite and Dravite Optic Character

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

Mimetite and Dravite Transparency

Similar to their colors, Mimetite 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, Mimetite is Translucent while Mimetite is Translucent in appearance.