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Verdite and Proustite Optical Properties


Proustite and Verdite Optical Properties


Optical Properties

Luster
Vitreous, Silky   
Adamantine   

Pleochroism
Extreme   
Moderate; cochineal-red to blood-red   

Dispersion
Not Available   
Not Available   

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

Refractive Index
1.580   
2.792-3.087   

Optic Character
Not Available   
Not Available   

Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c   
Trigonal   

Birefringence
Not Available   
0.295-0.296   

Clarity
Translucent   
OpaqueUlrich Henn and Claudio C. Milisenda   

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Verdite and Proustite Optic Character

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

Similar to their colors, Verdite 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, Verdite is Translucent while Verdite is Translucent in appearance.

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