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Vesuvianite and Covellite Optical Properties


Covellite and Vesuvianite Optical Properties


Optical Properties

Luster
Vitreous, Resinous   
Resinous   

Pleochroism
slight in colored varieties   
Marked   

Dispersion
Not Available   
Not Available   

Transparency
Not Available   
OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references   

Refractive Index
1.703-1.752   
1.45-2.62   

Optic Character
Not Available   
Not Available   

Crystal System
tetragonal   
Hexagonal   

Birefringence
0.004-0.006   
Not Available   

Clarity
Not Available   
OpaqueAnthony et al   

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Vesuvianite and Covellite Optic Character

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

Similar to their colors, Vesuvianite 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, Vesuvianite is Not Available while Vesuvianite is Not Available in appearance.

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