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Obsidian and Black Opal Optical Properties


Black Opal and Obsidian Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
AbsentWalter Schumann   
AbsentWalter Schumann   

Dispersion
0.01   
29
None   

Transparency
Transparent, Translucent   
Transparent, Translucent   

Refractive Index
1.450-1.550   
1.370-1.470   

Optic Character
Not Available   
Not Available   

Crystal System
Amorphous   
Not Available   

Birefringence
Not Available   
Not Available   

Clarity
Transparent   
Transparent   

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<< Physical Properties

Obsidian and Black Opal Optic Character

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

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

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