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Schorl and Cinnabar Optical Properties


Cinnabar and Schorl Optical Properties


Optical Properties

Luster
Vitreous   
Adamantine   

Pleochroism
Very strong: yellow-brown pale yellow   
NilArthur Thomas   

Dispersion
Not Available   
Not Available   

Transparency
Transparent, Translucent   
Translucent   

Refractive Index
1.635-1.672   
2.905-3.25   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Trigonal   

Birefringence
0.025   
Not Available   

Clarity
Transparent   
Translucent   

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Schorl and Cinnabar Optic Character

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

Similar to their colors, Schorl and Cinnabar 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, Schorl is Translucent and Transparent while Schorl is Translucent and Transparent in appearance.

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