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Humite and Dravite Optical Properties


Dravite and Humite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
pale golden yellow or deep golden yellow.   
Very strong: pale yellow colorless   

Dispersion
Not Available   
0.02   
22

Transparency
Transparent   
Transparent   

Refractive Index
1.607-1.675   
1.614-1.666   

Optic Character
Not Available   
Not Available   

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

Birefringence
Not Available   
0.014-0.032   

Clarity
Transparent   
Transparent   

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Humite and Dravite Optic Character

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

Similar to their colors, Humite 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, Humite is Transparent while Humite is Transparent in appearance.

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