Datolite and Catapleiite Optical Properties

Datolite

Catapleiite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

NilArthur Thomas

Not Available

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent

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

1.5 Refractive Index

1.621-1.6751.590-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

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

1.8 Birefringence

0.0440.039

0 0.296

1.9 Clarity

Transparent

TransparentUlrich Henn and Claudio C. Milisenda

Datolite and Catapleiite Optic Character

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

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