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Variscite
Variscite

Bertrandite
Bertrandite



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Variscite and Bertrandite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Waxy
Vitreous
1.2 Pleochroism
MissingWalter Schumann
none.
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Translucent, Opaque . May be translucent when backlit on the edges.
TransparentAnthony et al, Handbook of mineralogy (2001)
1.5 Refractive Index
1.560-1.594
1.583-1.614
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21
1.8 Birefringence
0.031
Not Available
1.9 Clarity
Translucent
TransparentAnthony et al

Variscite and Bertrandite Optic Character

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

Variscite and Bertrandite Transparency

Similar to their colors, Variscite and Bertrandite 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, Variscite is Opaque . May be translucent when backlit on the edges. and Translucent while Variscite is Opaque . May be translucent when backlit on the edges. and Translucent in appearance.