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Dravite and Forsterite Optical Properties


Forsterite and Dravite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Very strong: pale yellow colorless   
colorless.   

Dispersion
0.02   
22
Not Available   

Transparency
Transparent   
Transparent   

Refractive Index
1.614-1.666   
1.635-1.671   

Optic Character
Not Available   
Not Available   

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

Birefringence
0.014-0.032   
0.033-0.042   

Clarity
Transparent   
Transparent   

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Dravite and Forsterite Optic Character

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

Similar to their colors, Dravite and Forsterite 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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