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Alexandrite
Alexandrite

Scheelite
Scheelite



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Alexandrite
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Scheelite

Alexandrite and Scheelite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Adamantine
1.2 Pleochroism
Not Available
Definite dichoric in yellow (yellow to orange-brown)
1.3 Dispersion
NA0.04
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Transparent to nearly opaque
Translucent, Transparent
1.5 Refractive Index
1.739-1.7701.918-1.936
Agate Opal
1 3.25
1.6 Optic Character
Biaxial/+
Not Available
1.7 Crystal System
Orthorhombic
tetragonal
1.8 Birefringence
0.007-0.0100.016
Achroite
0 0.296
1.9 Clarity
Transparent
Translucent

Alexandrite and Scheelite Optic Character

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

Alexandrite and Scheelite Transparency

Similar to their colors, Alexandrite 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, Alexandrite is Transparent and Transparent to nearly opaque while Alexandrite is Transparent and Transparent to nearly opaque in appearance.