Williamsite and Proustite Optical Properties

Williamsite

Proustite

Add ⊕

1 Optical Properties

1.1 Luster

Waxy, Silky, Resinous, Greasy

Adamantine

1.2 Pleochroism

Not Available

Moderate; cochineal-red to blood-red

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

TranslucentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)

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

1.5 Refractive Index

1.530-1.5752.792-3.087

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

TranslucentHerve Nicolas Lazzarelli

OpaqueUlrich Henn and Claudio C. Milisenda

Williamsite and Proustite Optic Character

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

Compare Green Gemstones

Williamsite Vs Fancy Diamond

Williamsite Vs Idocrase

Williamsite Vs Garnet Malaia

Williamsite and Proustite Transparency

Similar to their colors, Williamsite 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, Williamsite is Blue Chart Gem Identification (2010) and TranslucentHerve Nicolas Lazzarelli while Williamsite is Blue Chart Gem Identification (2010) and TranslucentHerve Nicolas Lazzarelli in appearance.