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Mottramite
Mottramite

Kyanite
Kyanite



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Mottramite
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Kyanite

Mottramite and Kyanite Optical Properties

Optical Properties

Luster

Greasy
Vitreous, Pearly

Pleochroism

Visible X=Y= canary yellow to greenish yellow
Trichroic

Dispersion

0.040.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

2.1701.71-1.74
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Triclinic

Birefringence

0.150-9999
0 0.296
👆🏻

Clarity

-
-

Mottramite and Kyanite Optic Character

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

Mottramite and Kyanite Transparency

Similar to their colors, Mottramite and Kyanite 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, Mottramite is while Mottramite is in appearance.