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Colemanite and Ruby Optical Properties


Ruby and Colemanite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Adamantine, Vitreous, Adamantine   

Pleochroism
NilArthur Thomas   
Strong: purplish-red   

Dispersion
Not Available   
0.02   
21

Transparency
Transparent   
Transparent, Translucent, Transparent to opaque   

Refractive Index
1.584-1.615   
1.762-1.778   

Optic Character
Not Available   
Not Available   

Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a   
Trigonal   

Birefringence
0.028-0.030   
0.008   

Clarity
Transparent   
Transparent   

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Colemanite and Ruby Optic Character

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

Similar to their colors, Colemanite and Ruby 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, Colemanite is Transparent while Colemanite is Transparent in appearance.

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