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Coral and Covellite Optical Properties


Covellite and Coral Optical Properties


Optical Properties

Luster
Not Available   
Resinous   

Pleochroism
AbsentWalter Schumann   
Marked   

Dispersion
None   
Not Available   

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

Refractive Index
1.486-1.658   
1.45-2.62   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Hexagonal   

Birefringence
0.160-0.172   
Not Available   

Clarity
Translucent   
OpaqueAnthony et al   

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<< Physical Properties

Coral and Covellite Optic Character

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

Similar to their colors, Coral 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, Coral is Translucent while Coral is Translucent in appearance.

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