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Zoisite and Cobaltite Optical Properties


Cobaltite and Zoisite Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
X = pale pink to red-violet; Y = nearly colorless to bright pink or deep blue; Z = pale yellow to yellow-green   
Very weak   

Dispersion
0.02   
19
Not Available   

Transparency
Transparent, Translucent, Opaque . May be translucent in thin backlit sections.   
Gems   

Refractive Index
1.685-1.707   
Not Available   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: P ca21   

Birefringence
0.006-0.018   
Not Available   

Clarity
Transparent   
Gems   

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Zoisite and Cobaltite Optic Character

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

Similar to their colors, Zoisite and Cobaltite 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, Zoisite is Opaque . May be translucent in thin backlit sections., Translucent and Transparent while Zoisite is Opaque . May be translucent in thin backlit sections., Translucent and Transparent in appearance.

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