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Powellite
Powellite

Variscite
Variscite



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Variscite

Powellite and Variscite Optical Properties

1 Optical Properties
1.1 Luster
Greasy, Subadamantine
Vitreous, Waxy
1.2 Pleochroism
In deeply colored specimens: blue greenAnthony et al
MissingWalter Schumann
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Translucent, Opaque . May be translucent when backlit on the edges.
1.5 Refractive Index
1.974-1.9841.560-1.594
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Orthorhombic
1.8 Birefringence
Not Available0.031
Achroite
0 0.296
1.9 Clarity
Transparent
Translucent

Powellite and Variscite Optic Character

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

Powellite and Variscite Transparency

Similar to their colors, Powellite and Variscite 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, Powellite is Transparent while Powellite is Transparent in appearance.