Catapleiite and Thulite Optical Properties

Catapleiite

Thulite

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Optical Properties

Luster

Vitreous

Pleochroism

Present

Dispersion

0.010.02

0.005 1

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Transparency

TransparentUlrich Henn and Claudio C. Milisenda

Opaque, Translucent, Opaque . May be translucent in thin backlit sections.

Refractive Index

1.590-1.6291.695

1 3.25

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Optic Character

Crystal System

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

Orthorhombic

Birefringence

0.0390.006-0.018

0 0.296

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Clarity

TransparentUlrich Henn and Claudio C. Milisenda

OpaqueHerve Nicolas Lazzarelli

Catapleiite and Thulite Optic Character

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

Similar to their colors, Catapleiite and Thulite 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, Catapleiite is TransparentUlrich Henn and Claudio C. Milisenda while Catapleiite is TransparentUlrich Henn and Claudio C. Milisenda in appearance.