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Scheelite and Fayalite Optical Properties


Fayalite and Scheelite Optical Properties


Optical Properties

Luster
Vitreous, Adamantine   
Vitreous, Resinous   

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

Dispersion
0.04   
12
Not Available   

Transparency
Translucent, Transparent   
TransparentAnthony et al, Handbook of mineralogy (2001)   

Refractive Index
1.918-1.936   
1.827-1.879   

Optic Character
Not Available   
Not Available   

Crystal System
tetragonal   
Orthorhombic   

Birefringence
0.016   
0.042-0.051   

Clarity
Translucent   
TransparentAnthony et al   

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Scheelite and Fayalite Optic Character

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

Similar to their colors, Scheelite and Fayalite 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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