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Kyanite
Kyanite

Topaz
Topaz



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Kyanite
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Topaz

Kyanite and Topaz Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous
1.2 Pleochroism
Trichroic
Weak
1.3 Dispersion
NA0.01
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
Transparent
1.5 Refractive Index
1.71-1.741.606-1.644
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Triclinic
Orthorhombic
1.8 Birefringence
Not Available0.008-0.011
Achroite
0 0.296
1.9 Clarity
Color grading system
TransparentUlrich Henn and Claudio C. Milisenda

Kyanite and Topaz Optic Character

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

Similar to their colors, Kyanite and Topaz 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.