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Chrysoprase and Zoisite Optical Properties


Zoisite and Chrysoprase Optical Properties


Optical Properties

Luster
Vitreous, Vitreous, Waxy   
Vitreous   

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

Dispersion
None   
0.02   
19

Transparency
Translucent, Translucent, Opaque, Translucent to nearly opaque   
Transparent, Translucent, Opaque . May be translucent in thin backlit sections.   

Refractive Index
1.530-1.543   
1.685-1.707   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Orthorhombic   

Birefringence
0.004   
0.006-0.018   

Clarity
Translucent   
Transparent   

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Chrysoprase and Zoisite Optic Character

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

Similar to their colors, Chrysoprase and Zoisite 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, Chrysoprase is Opaque, Translucent, Translucent and Translucent to nearly opaque while Chrysoprase is Opaque, Translucent, Translucent and Translucent to nearly opaque in appearance.

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