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Riebeckite and Covellite Optical Properties


Covellite and Riebeckite Optical Properties


Optical Properties

Luster
Vitreous, Silky   
Resinous   

Pleochroism
X = blue   
Marked   

Dispersion
Not Available   
Not Available   

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

Refractive Index
1.680-1.698   
1.45-2.62   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Hexagonal   

Birefringence
0.005-0.008   
Not Available   

Clarity
Not Available   
OpaqueAnthony et al   

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Riebeckite and Covellite Optic Character

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

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

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