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Willemite and Catapleiite Optical Properties


Catapleiite and Willemite Optical Properties


Optical Properties

Luster
Vitreous, Resinous   
Vitreous   

Pleochroism
NilArthur Thomas   
Not Available   

Dispersion
Not Available   
Not Available   

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

Refractive Index
1.687-1.723   
1.590-1.629   

Optic Character
Not Available   
Not Available   

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

Birefringence
0.028-0.030   
0.039   

Clarity
Transparent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Willemite and Catapleiite Optic Character

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

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

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