Pearl and Catapleiite Optical Properties

Pearl

Catapleiite

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1 Optical Properties

1.1 Luster

Pearly

Vitreous

1.2 Pleochroism

AbsentWalter Schumann

Not Available

1.3 Dispersion

NoneNA

0.007 1

1.4 Transparency

Translucent, Opaque

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

1.5 Refractive Index

1.52-1.661.590-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

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

1.8 Birefringence

0.1560.039

0 0.296

1.9 Clarity

Translucent

TransparentUlrich Henn and Claudio C. Milisenda

Pearl and Catapleiite Optic Character

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

Similar to their colors, Pearl 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, Pearl is Opaque and Translucent while Pearl is Opaque and Translucent in appearance.