Scheelite and Catapleiite Optical Properties

Scheelite

Catapleiite

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1 Optical Properties

1.1 Luster

Vitreous, Adamantine

Vitreous

1.2 Pleochroism

Definite dichoric in yellow (yellow to orange-brown)

Not Available

1.3 Dispersion

0.04NA

0.007 1

1.4 Transparency

Translucent, Transparent

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

1.5 Refractive Index

1.918-1.9361.590-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

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

1.8 Birefringence

0.0160.039

0 0.296

1.9 Clarity

Translucent

TransparentUlrich Henn and Claudio C. Milisenda

Scheelite and Catapleiite Optic Character

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

Similar to their colors, Scheelite 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, Scheelite is Translucent and Transparent while Scheelite is Translucent and Transparent in appearance.