Malachite and Williamsite Optical Properties

Malachite

Williamsite

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Optical Properties

Luster

Adamantine, Vitreous, Silky

Waxy, Silky, Resinous, Greasy

Pleochroism

Dispersion

0.040.03

0.005 1

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Transparency

Opaque

TranslucentHerve Nicolas Lazzarelli

Refractive Index

1.655-1.9091.530-1.575

1 3.25

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Optic Character

Crystal System

monoclinic

Birefringence

0.254-9999

0 0.296

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Clarity

TranslucentHerve Nicolas Lazzarelli

Malachite and Williamsite Optic Character

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

Similar to their colors, Malachite and Williamsite 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, Malachite is Opaque while Malachite is Opaque in appearance.