Eudialyte and Catapleiite Optical Properties

Eudialyte

Catapleiite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Weak: O= colorless

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

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

1.5 Refractive Index

1.591-1.6331.590-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

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

1.8 Birefringence

0.003-0.0100.039

0 0.296

1.9 Clarity

Translucent

TransparentUlrich Henn and Claudio C. Milisenda

Eudialyte and Catapleiite Optic Character

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

Similar to their colors, Eudialyte 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, Eudialyte is Translucent while Eudialyte is Translucent in appearance.