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Verdelite and Proustite Optical Properties


Proustite and Verdelite Optical Properties


Optical Properties

Luster
Not Available   
Adamantine   

Pleochroism
Strong: dark green yellow   
Moderate; cochineal-red to blood-red   

Dispersion
0.02   
22
Not Available   

Transparency
Transparent, Translucent   
OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) Rarely transparentMore from other references   

Refractive Index
1.614-1.666   
2.792-3.087   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Trigonal   

Birefringence
0.014-0.040   
0.295-0.296   

Clarity
Transparent   
OpaqueUlrich Henn and Claudio C. Milisenda   

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Verdelite and Proustite Optic Character

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

Similar to their colors, Verdelite and Proustite 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, Verdelite is Translucent and Transparent while Verdelite is Translucent and Transparent in appearance.

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