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Crystal Opal and Obsidian Optical Properties


Obsidian and Crystal Opal Optical Properties


Optical Properties

Luster
Not Available   
Vitreous   

Pleochroism
AbsentWalter Schumann   
AbsentWalter Schumann   

Dispersion
None   
0.01   
29

Transparency
Transparent   
Transparent, Translucent   

Refractive Index
1.370-1.   
1.450-1.550   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Amorphous   

Birefringence
Not Available   
Not Available   

Clarity
Transparent   
Transparent   

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<< Physical Properties

Crystal Opal and Obsidian Optic Character

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

Similar to their colors, Crystal Opal 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, Crystal Opal is Transparent while Crystal Opal is Transparent in appearance.

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