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Albite and Dravite Optical Properties


Dravite and Albite Optical Properties


Optical Properties

Luster
Vitreous, Pearly  
Vitreous  

Pleochroism
colorless.  
Very strong: pale yellow colorless  

Dispersion
1.00  
1
0.02  
99+

Transparency
Transparent, Translucent  
Transparent  

Refractive Index
1.525-1.542  
1.614-1.666  

Optic Character
-  
-  

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

Birefringence
0.008-0.011  
0.014-0.032  

Clarity
Transparent  
Transparent  

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Albite and Dravite Optic Character

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

Similar to their colors, Albite 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, Albite is Transparent and Translucent while Albite is Transparent and Translucent in appearance.

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