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Scheelite and Phosgenite Optical Properties


Phosgenite and Scheelite Optical Properties


Optical Properties

Luster
Vitreous, Adamantine  
Adamantine  

Pleochroism
Definite dichoric in yellow (yellow to orange-brown)  
Weakly pleochroic with O reddish and E greenish in thick sections.  

Dispersion
0.04  
36
0.04  
33

Transparency
Translucent, Transparent  
-  

Refractive Index
1.918-1.936  
2.117-2.145  

Optic Character
-  
-  

Crystal System
tetragonal  
tetragonal  

Birefringence
0.016  
0.027  

Clarity
Translucent  
TransparentUlrich Henn and Claudio C. Milisenda  

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Scheelite and Phosgenite Optic Character

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

Similar to their colors, Scheelite and Phosgenite 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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Yellow Gemstones


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