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Scheelite and Rubellite Optical Properties


Rubellite and Scheelite Optical Properties


Optical Properties

Luster
Vitreous, Adamantine  
-  

Pleochroism
Definite dichoric in yellow (yellow to orange-brown)  
Strong: dark red pinkish-redHerve Nicolas Lazzarelli  

Dispersion
0.04  
36
0.02  
99+

Transparency
Translucent, Transparent  
Transparent, Translucent  

Refractive Index
1.918-1.936  
1.614-1.666  

Optic Character
-  
-  

Crystal System
tetragonal  
-  

Birefringence
0.016  
0.014-0.040  

Clarity
Translucent  
Transparent  

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Scheelite and Rubellite Optic Character

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

Similar to their colors, Scheelite and Rubellite 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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