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Dravite and Albite Optical Properties


Albite and Dravite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Pearly   

Pleochroism
Very strong: pale yellow colorless   
colorless.   

Dispersion
0.02   
22
1.00   
1

Transparency
Transparent   
Transparent, Translucent   

Refractive Index
1.614-1.666   
1.525-1.542   

Optic Character
Not Available   
Not Available   

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

Birefringence
0.014-0.032   
0.008-0.011   

Clarity
Transparent   
Transparent   

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<< Physical Properties

Dravite and Albite Optic Character

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

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

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