Thomsonite and Williamsite Optical Properties

Thomsonite

Williamsite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Waxy, Silky, Resinous, Greasy

1.2 Pleochroism

NilArthur Thomas

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

1.510-1.5501.530-1.575

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Not Available

1.8 Birefringence

0.015-0.020Not Available

0 0.296

1.9 Clarity

Translucent

TranslucentHerve Nicolas Lazzarelli

Thomsonite and Williamsite Optic Character

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

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