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Obsidian and Amethyst Optical Properties


Amethyst and Obsidian Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
AbsentWalter Schumann   
None   

Dispersion
0.01   
29
0.01   
27

Transparency
Transparent, Translucent   
Transparent, Transparent to translucent   

Refractive Index
1.450-1.550   
1.544-1.553   

Optic Character
Not Available   
Not Available   

Crystal System
Amorphous   
Trigonal   

Birefringence
Not Available   
0.009   

Clarity
Transparent   
Transparent   

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Obsidian and Amethyst Optic Character

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

Similar to their colors, Obsidian and Amethyst 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, Obsidian is Transparent and Translucent while Obsidian is Transparent and Translucent in appearance.

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