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Dravite
Dravite

Antigorite
Antigorite



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Dravite
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Antigorite

Dravite and Antigorite Optical Properties

Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
Very strong: pale yellow colorless
0.02
Transparent
1.614-1.666
-
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
0.014-0.032
Transparent
 
Waxy, Silky, Resinous, Greasy
pale greenish yellow
0.02
Translucent
1.530-1.575
-
Monoclinic Domatic H-M Symbol (m) Space Group: Cm
-9999
Translucent

Dravite and Antigorite Optic Character

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

Similar to their colors, Dravite and Antigorite 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 while Dravite is in appearance.