Proustite and Povondraite Optical Properties

Proustite

Povondraite

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1 Optical Properties

1.1 Luster

Adamantine

Resinous

1.2 Pleochroism

Moderate; cochineal-red to blood-red

Strong: yellow-brown

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

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

Translucent

1.5 Refractive Index

2.792-3.087Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Not Available

1.8 Birefringence

0.295-0.296Not Available

0 0.296

1.9 Clarity

OpaqueUlrich Henn and Claudio C. Milisenda

Translucent

Proustite and Povondraite Optic Character

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

Similar to their colors, Proustite and Povondraite 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, Proustite is OpaqueUlrich Henn and Claudio C. Milisenda and Gemmological Tables (2004) Rarely transparentMore from other references while Proustite is OpaqueUlrich Henn and Claudio C. Milisenda and Gemmological Tables (2004) Rarely transparentMore from other references in appearance.