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Nephrite and Clinochlore Optical Properties


Clinochlore and Nephrite Optical Properties


Optical Properties

Luster
Vitreous, Greasy   
Pearly, Greasy   

Pleochroism
None   
Distinct: light yellow-green to light bluE   

Dispersion
Not Available   
Not Available   

Transparency
Translucent   
Transparent   

Refractive Index
1.600-1.627   
1.571-1.597   

Optic Character
Not Available   
Biaxial/+   

Crystal System
monoclinic   
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m   

Birefringence
0.027   
Not Available   

Clarity
Translucent   
Transparent   

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Nephrite and Clinochlore Optic Character

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

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Nephrite and Clinochlore Transparency

Similar to their colors, Nephrite and Clinochlore 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, Nephrite is Translucent while Nephrite is Translucent in appearance.

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