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Kyanite and Ludlamite Optical Properties


Ludlamite and Kyanite Optical Properties


Optical Properties

Luster
Vitreous, Pearly   
Vitreous, Pearly   

Pleochroism
Trichroic   
NilArthur Thomas   

Dispersion
Not Available   
Not Available   

Transparency
Not Available   
Gemmological Tables (2004) More from other references   

Refractive Index
1.71-1.74   
1.653-1.693   

Optic Character
Not Available   
Not Available   

Crystal System
Triclinic   
monoclinic   

Birefringence
Not Available   
0.038-0.044   

Clarity
Color grading system   
TransparentUlrich Henn and Claudio C. Milisenda   

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Kyanite and Ludlamite Optic Character

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

Similar to their colors, Kyanite and Ludlamite 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, Kyanite is Not Available while Kyanite is Not Available in appearance.

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