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Phenakite and Verdite Optical Properties


Verdite and Phenakite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Silky   

Pleochroism
Distinct: colorless orangy-yellowHerve Nicolas Lazzarelli   
Extreme   

Dispersion
0.02   
24
Not Available   

Transparency
Gemmological Tables (2004) More from other references   
Translucent   

Refractive Index
1.650-1.695   
1.580   

Optic Character
Not Available   
Not Available   

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

Birefringence
0.016   
Not Available   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Translucent   

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Phenakite and Verdite Optic Character

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

Similar to their colors, Phenakite and Verdite 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, Phenakite is Gemmological Tables (2004) More from other references while Phenakite is Gemmological Tables (2004) More from other references in appearance.

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