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Sugilite and Omphacite Optical Properties


Omphacite and Sugilite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Weak   
Weak: colorless -- very pale green -- very pale green   

Dispersion
Not Available   
Not Available   

Transparency
Translucent   
TranslucentAnthony et al, Handbook of mineralogy (2001)   

Refractive Index
1.607-1.612   
1.662-1.723   

Optic Character
Not Available   
Not Available   

Crystal System
Hexagonal   
Not Available   

Birefringence
0.003   
Not Available   

Clarity
Translucent   
TranslucentAnthony et al   

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Sugilite and Omphacite Optic Character

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

Similar to their colors, Sugilite and Omphacite 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, Sugilite is Translucent while Sugilite is Translucent in appearance.

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