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Jade and Covellite Optical Properties


Covellite and Jade Optical Properties


Optical Properties

Luster
Vitreous   
Resinous   

Pleochroism
AbsentWalter Schumann   
Marked   

Dispersion
None   
Not Available   

Transparency
Translucent, Translucent to opaque   
OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references   

Refractive Index
1.600-1.688   
1.45-2.62   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Hexagonal   

Birefringence
0.020-0.027   
Not Available   

Clarity
Translucent   
OpaqueAnthony et al   

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Jade and Covellite Optic Character

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

Similar to their colors, Jade and Covellite 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, Jade is Translucent and Translucent to opaque while Jade is Translucent and Translucent to opaque in appearance.

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Semi Precious


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