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Omphacite and Herderite Optical Properties


Herderite and Omphacite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Weak: colorless -- very pale green -- very pale green   
Not Available   

Dispersion
Not Available   
Not Available   

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

Refractive Index
1.662-1.723   
1.587-1.642   

Optic Character
Not Available   
Biaxial/+   

Crystal System
Not Available   
monoclinic   

Birefringence
Not Available   
0.028-0.032   

Clarity
TranslucentAnthony et al   
Transparent   

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Omphacite and Herderite Optic Character

Omphacite and Herderite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Omphacite and Herderite 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 Omphacite and Herderite 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. Herderite has Biaxial/+ character.

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Omphacite and Herderite Transparency

Similar to their colors, Omphacite and Herderite 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, Omphacite is Handbook of mineralogy (2001) and TranslucentAnthony et al while Omphacite is Handbook of mineralogy (2001) and TranslucentAnthony et al in appearance.

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Green Gemstones


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