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Phenakite
Phenakite

Variscite
Variscite



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Variscite

Phenakite and Variscite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Waxy
1.2 Pleochroism
Distinct: colorless orangy-yellowHerve Nicolas Lazzarelli
MissingWalter Schumann
1.3 Dispersion
Albite Optical ..
0.02
Rank: 24 (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Gemmological Tables (2004) More from other references
Translucent, Opaque . May be translucent when backlit on the edges.
1.5 Refractive Index
1.650-1.695
1.560-1.594
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Orthorhombic
1.8 Birefringence
0.016
0.031
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Translucent

Phenakite and Variscite Optic Character

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

Phenakite and Variscite Transparency

Similar to their colors, Phenakite 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, Phenakite is Gemmological Tables (2004) More from other references while Phenakite is Gemmological Tables (2004) More from other references in appearance.