Kyanite and Catapleiite Optical Properties

Kyanite

Catapleiite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Vitreous

1.2 Pleochroism

Trichroic

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)

1.5 Refractive Index

1.71-1.741.590-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Triclinic

Monoclinic Prismatic H-M Symbol (2/m) Space Group: B2/b (pseudo-HEX)

1.8 Birefringence

Not Available0.039

0 0.296

1.9 Clarity

Color grading system

TransparentUlrich Henn and Claudio C. Milisenda

Kyanite and Catapleiite Optic Character

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

Similar to their colors, Kyanite and Catapleiite 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.