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Peridot and Dravite Optical Properties


Dravite and Peridot Optical Properties


Optical Properties

Luster
Vitreous, Greasy   
Vitreous   

Pleochroism
Weak: yellow-green green (colorless)Herve Nicolas Lazzarelli   
Very strong: pale yellow colorless   

Dispersion
0.02   
18
0.02   
22

Transparency
Transparent   
Transparent   

Refractive Index
1.64-1.69   
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
0.036   
0.014-0.032   

Clarity
Transparent   
Transparent   

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Peridot and Dravite Optic Character

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

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

Semi Precious

Semi Precious


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