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Euclase and Kyanite Cyprine Optical Properties


Kyanite Cyprine and Euclase Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Weak: colorless-(greenish) yellow   
Blue stones strong trichroism: colorless/pale blue (greenish or violet)-blue dark blueHerve Nicolas Lazzarelli   

Dispersion
0.02   
23
0.02   
18

Transparency
Gemmological Tables (2004) More from other references   
Transparent   

Refractive Index
1.650-1.677   
1.710-1.735   

Optic Character
Not Available   
Biaxial/+   

Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a   
Not Available   

Birefringence
0.019-0.025   
0.012-0.033   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Transparent   

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Euclase and Kyanite Cyprine Optic Character

Euclase and Kyanite Cyprine optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Euclase and Kyanite Cyprine 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 Euclase and Kyanite Cyprine 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. Kyanite Cyprine has Biaxial/+ character.

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Euclase and Kyanite Cyprine Transparency

Similar to their colors, Euclase and Kyanite Cyprine 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, Euclase is Gemmological Tables (2004) More from other references while Euclase is Gemmological Tables (2004) More from other references in appearance.

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