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Phenakite and Obsidian Optical Properties


Obsidian and Phenakite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Distinct: colorless orangy-yellowHerve Nicolas Lazzarelli   
AbsentWalter Schumann   

Dispersion
0.02   
24
0.01   
29

Transparency
Gemmological Tables (2004) More from other references   
Transparent, Translucent   

Refractive Index
1.650-1.695   
1.450-1.550   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Amorphous   

Birefringence
0.016   
Not Available   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Transparent   

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Phenakite and Obsidian Optic Character

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

Similar to their colors, Phenakite and Obsidian 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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