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Beudantite and Dravite Optical Properties


Dravite and Beudantite Optical Properties


Optical Properties

Luster
Vitreous, Resinous  
Vitreous  

Pleochroism
visible  
Very strong: pale yellow colorless  

Dispersion
0.03  
99+
0.02  
99+

Transparency
-  
Transparent  

Refractive Index
1.957  
1.614-1.666  

Optic Character
-  
-  

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

Birefringence
0.014  
0.014-0.032  

Clarity
-  
Transparent  

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Beudantite and Dravite Optic Character

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

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Beudantite and Dravite Transparency

Similar to their colors, Beudantite 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, Beudantite is while Beudantite is in appearance.

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