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Kyanite and Dumortierite Optical Properties


Dumortierite and Kyanite Optical Properties


Optical Properties

Luster
Vitreous, Pearly   
Vitreous   

Pleochroism
Trichroic   
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue   

Dispersion
Not Available   
None   

Transparency
Not Available   
Translucent, Translucent to opaque   

Refractive Index
1.71-1.74   
1.669-1.723   

Optic Character
Not Available   
Not Available   

Crystal System
Triclinic   
Orthorhombic   

Birefringence
Not Available   
0.011-0.037   

Clarity
Color grading system   
Translucent   

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Kyanite and Dumortierite Optic Character

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

Similar to their colors, Kyanite and Dumortierite 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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