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Augite and Spinel Optical Properties


Spinel and Augite Optical Properties


Optical Properties

Luster
Vitreous, Resinous   
Vitreous   

Pleochroism
Pale green   
Absent   

Dispersion
Not Available   
0.02   
18

Transparency
Transparent, Translucent   
Transparent, Translucent, Transparent to translucent   

Refractive Index
1.671-1.774   
1.73   

Optic Character
Not Available   
Not Available   

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

Birefringence
Not Available   
Not Available   

Clarity
Transparent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Augite and Spinel Optic Character

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

Similar to their colors, Augite and Spinel 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, Augite is Translucent and Transparent while Augite is Translucent and Transparent in appearance.

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