Shattuckite and Proustite Optical Properties

Shattuckite

Proustite

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1 Optical Properties

1.1 Luster

Silky

Adamantine

1.2 Pleochroism

X = very pale blue; Y = pale blue; Z = deep blue

Moderate; cochineal-red to blood-red

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

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

1.5 Refractive Index

1.752-1.8152.792-3.087

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Trigonal

1.8 Birefringence

0.0630.295-0.296

0 0.296

1.9 Clarity

Translucent

OpaqueUlrich Henn and Claudio C. Milisenda

Shattuckite and Proustite Optic Character

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

Similar to their colors, Shattuckite 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, Shattuckite is Translucent while Shattuckite is Translucent in appearance.