Verdite and Williamsite Optical Properties

Verdite

Williamsite

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1 Optical Properties

1.1 Luster

Vitreous, Silky

Waxy, Silky, Resinous, Greasy

1.2 Pleochroism

Extreme

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

TranslucentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)

1.5 Refractive Index

1.5801.530-1.575

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c

Not Available

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Translucent

TranslucentHerve Nicolas Lazzarelli

Verdite and Williamsite Optic Character

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

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