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Cinnabar and Williamsite Optical Properties


Williamsite and Cinnabar Optical Properties


Optical Properties

Luster
Adamantine   
Waxy, Silky, Resinous, Greasy   

Pleochroism
NilArthur Thomas   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Translucent   
TranslucentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)   

Refractive Index
2.905-3.25   
1.530-1.575   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Not Available   

Birefringence
Not Available   
Not Available   

Clarity
Translucent   
TranslucentHerve Nicolas Lazzarelli   

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Cinnabar and Williamsite Optic Character

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

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

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