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Opal
Opal

Variscite
Variscite



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Opal
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Variscite

Opal and Variscite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous, Waxy
1.2 Pleochroism
None
MissingWalter Schumann
1.3 Dispersion
NoneNA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent, Transparent to translucent
Translucent, Opaque . May be translucent when backlit on the edges.
1.5 Refractive Index
1.37-1.521.560-1.594
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Orthorhombic
1.8 Birefringence
Not Available0.031
Achroite
0 0.296
1.9 Clarity
Transparent
Translucent

Opal and Variscite Optic Character

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

Opal and Variscite Transparency

Similar to their colors, Opal 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, Opal is Translucent, Transparent and Transparent to translucent while Opal is Translucent, Transparent and Transparent to translucent in appearance.