Sheen Obsidian and Proustite Optical Properties

Sheen Obsidian

Proustite

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1 Optical Properties

1.1 Luster

Not Available

Adamantine

1.2 Pleochroism

Not Available

Moderate; cochineal-red to blood-red

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Translucent

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

1.5 Refractive Index

1.450-1.5502.792-3.087

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Trigonal

1.8 Birefringence

Not Available0.295-0.296

0 0.296

1.9 Clarity

Transparent

OpaqueUlrich Henn and Claudio C. Milisenda

Sheen Obsidian and Proustite Optic Character

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

Similar to their colors, Sheen Obsidian 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, Sheen Obsidian is Translucent and Transparent while Sheen Obsidian is Translucent and Transparent in appearance.