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Amazonite
Amazonite

Dravite
Dravite



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Amazonite
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Dravite

Amazonite and Dravite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

-
Very strong: pale yellow colorless

Dispersion

0.010.02
0.005 1
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Transparency

Translucent, Translucent to opaque
Transparent

Refractive Index

1.522-1.5301.614-1.666
1 3.25
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Optic Character

-
-

Crystal System

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

Birefringence

0.008-0.0100.014-0.032
0 0.296
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Clarity

Translucent
Transparent

Amazonite and Dravite Optic Character

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

Amazonite and Dravite Transparency

Similar to their colors, Amazonite 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, Amazonite is Translucent and Translucent to opaque while Amazonite is Translucent and Translucent to opaque in appearance.