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Scheelite and Topaz Optical Properties


Topaz and Scheelite Optical Properties


Optical Properties

Luster
Vitreous, Adamantine   
Vitreous   

Pleochroism
Definite dichoric in yellow (yellow to orange-brown)   
Weak   

Dispersion
0.04   
12
0.01   
26

Transparency
Translucent, Transparent   
Transparent   

Refractive Index
1.918-1.936   
1.606-1.644   

Optic Character
Not Available   
Not Available   

Crystal System
tetragonal   
Orthorhombic   

Birefringence
0.016   
0.008-0.011   

Clarity
Translucent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Scheelite and Topaz Optic Character

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

Similar to their colors, Scheelite and Topaz 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.

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