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Fayalite
Fayalite

Scheelite
Scheelite



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Fayalite
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Scheelite

Fayalite and Scheelite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Resinous
Vitreous, Adamantine
1.2 Pleochroism
Faint
Definite dichoric in yellow (yellow to orange-brown)
1.3 Dispersion
NA0.04
Fluorite Optical Properties
0.007 1
1.4 Transparency
TransparentAnthony et al, Handbook of mineralogy (2001)
Translucent, Transparent
1.5 Refractive Index
1.827-1.8791.918-1.936
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
tetragonal
1.8 Birefringence
0.042-0.0510.016
Achroite
0 0.296
1.9 Clarity
TransparentAnthony et al
Translucent

Fayalite and Scheelite Optic Character

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

Fayalite and Scheelite Transparency

Similar to their colors, Fayalite and Scheelite 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, Fayalite is Handbook of mineralogy (2001) and TransparentAnthony et al while Fayalite is Handbook of mineralogy (2001) and TransparentAnthony et al in appearance.