Scheelite and Williamsite Optical Properties

Scheelite

Williamsite

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1 Optical Properties

1.1 Luster

Vitreous, Adamantine

Waxy, Silky, Resinous, Greasy

1.2 Pleochroism

Definite dichoric in yellow (yellow to orange-brown)

Not Available

1.3 Dispersion

0.04NA

0.007 1

1.4 Transparency

Translucent, Transparent

TranslucentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)

1.5 Refractive Index

1.918-1.9361.530-1.575

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

Not Available

1.8 Birefringence

0.016Not Available

0 0.296

1.9 Clarity

Translucent

TranslucentHerve Nicolas Lazzarelli

Scheelite and Williamsite Optic Character

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

Similar to their colors, Scheelite 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, Scheelite is Translucent and Transparent while Scheelite is Translucent and Transparent in appearance.