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Zoisite and Augite Optical Properties


Augite and Zoisite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Resinous   

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

Dispersion
0.02   
19
Not Available   

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

Refractive Index
1.685-1.707   
1.671-1.774   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c   

Birefringence
0.006-0.018   
Not Available   

Clarity
Transparent   
Transparent   

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Zoisite and Augite Optic Character

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

Similar to their colors, Zoisite and Augite 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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