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Almandine Garnet and Dravite Optical Properties


Dravite and Almandine Garnet Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Not Available   
Very strong: pale yellow colorless   

Dispersion
Not Available   
0.02   
22

Transparency
Transparent, Translucent, Transparent to translucent   
Transparent   

Refractive Index
1.780-1.810   
1.614-1.666   

Optic Character
Not Available   
Not Available   

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

Birefringence
Not Available   
0.014-0.032   

Clarity
Transparent to translucent   
Transparent   

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Almandine Garnet and Dravite Optic Character

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

Similar to their colors, Almandine Garnet 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, Almandine Garnet is Translucent, Transparent and Transparent to translucent while Almandine Garnet is Translucent, Transparent and Transparent to translucent in appearance.

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