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Bastnasite and Kyanite Cyprine Optical Properties


Kyanite Cyprine and Bastnasite Optical Properties


Optical Properties

Luster
Vitreous, Greasy, Pearly   
Vitreous   

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

Dispersion
Not Available   
0.02   
18

Transparency
Gemmological Tables (2004) More from other references   
Transparent   

Refractive Index
1.717-1.722   
1.710-1.735   

Optic Character
Not Available   
Biaxial/+   

Crystal System
Hexagonal   
Not Available   

Birefringence
0.100   
0.012-0.033   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Transparent   

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Bastnasite and Kyanite Cyprine Optic Character

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

Similar to their colors, Bastnasite 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, Bastnasite is Gemmological Tables (2004) More from other references while Bastnasite is Gemmological Tables (2004) More from other references in appearance.

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Red Gemstones


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