Cavansite and Proustite Optical Properties

Cavansite

Proustite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Adamantine

1.2 Pleochroism

Visible: X=Z= colorless Y= blue

Moderate; cochineal-red to blood-red

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

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

1.5 Refractive Index

1.5422.792-3.087

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Trigonal

1.8 Birefringence

0.0090.295-0.296

0 0.296

1.9 Clarity

Not Available

OpaqueUlrich Henn and Claudio C. Milisenda

Cavansite and Proustite Optic Character

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

Similar to their colors, Cavansite 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, Cavansite is Not Available while Cavansite is Not Available in appearance.