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Scheelite and Danburite Optical Properties


Danburite and Scheelite Optical Properties


Optical Properties

Luster
Vitreous, Adamantine   
Vitreous, Greasy   

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

Dispersion
0.04   
12
0.02   
22

Transparency
Translucent, Transparent   
Gemmological Tables (2004) More from other references   

Refractive Index
1.918-1.936   
1.627-1.639   

Optic Character
Not Available   
Biaxial/+   

Crystal System
tetragonal   
Orthorhombic   

Birefringence
0.016   
0.006   

Clarity
Translucent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Scheelite and Danburite Optic Character

Scheelite and Danburite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Scheelite and Danburite 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 Danburite 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. Danburite has Biaxial/+ character.

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Scheelite and Danburite Transparency

Similar to their colors, Scheelite and Danburite 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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