Variscite and Proustite Optical Properties

Variscite

Proustite

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1 Optical Properties

1.1 Luster

Vitreous, Waxy

Adamantine

1.2 Pleochroism

MissingWalter Schumann

Moderate; cochineal-red to blood-red

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent, Opaque . May be translucent when backlit on the edges.

OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) Rarely transparentMore from other references

1.5 Refractive Index

1.560-1.5942.792-3.087

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Trigonal

1.8 Birefringence

0.0310.295-0.296

0 0.296

1.9 Clarity

Translucent

OpaqueUlrich Henn and Claudio C. Milisenda

Variscite and Proustite Optic Character

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

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Variscite and Proustite Transparency

Similar to their colors, Variscite and Proustite 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.