Colemanite and Catapleiite Optical Properties

Colemanite

Catapleiite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

NilArthur Thomas

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

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

1.5 Refractive Index

1.584-1.6151.590-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a

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

1.8 Birefringence

0.028-0.0300.039

0 0.296

1.9 Clarity

Transparent

TransparentUlrich Henn and Claudio C. Milisenda

Colemanite and Catapleiite Optic Character

Colemanite and Catapleiite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Colemanite 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 Colemanite 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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Colemanite Vs Cubic Zirconia

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Colemanite and Catapleiite Transparency

Similar to their colors, Colemanite 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, Colemanite is Transparent while Colemanite is Transparent in appearance.