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Nickeline and Black Opal Optical Properties


Black Opal and Nickeline Optical Properties


Optical Properties

Luster
Not Available   
Not Available   

Pleochroism
Strong (reflected light)   
AbsentWalter Schumann   

Dispersion
Not Available   
None   

Transparency
Not Available   
Transparent, Translucent   

Refractive Index
Not Available   
1.370-1.470   

Optic Character
Not Available   
Not Available   

Crystal System
Hexagonal   
Not Available   

Birefringence
Not Available   
Not Available   

Clarity
Not Available   
Transparent   

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Nickeline and Black Opal Optic Character

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

Similar to their colors, Nickeline 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, Nickeline is Not Available while Nickeline is Not Available in appearance.

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Red Gemstones


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