Cavansite and Williamsite Optical Properties

Cavansite

Williamsite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Waxy, Silky, Resinous, Greasy

1.2 Pleochroism

Visible: X=Z= colorless Y= blue

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

TranslucentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)

1.5 Refractive Index

1.5421.530-1.575

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Not Available

1.8 Birefringence

0.009Not Available

0 0.296

1.9 Clarity

Not Available

TranslucentHerve Nicolas Lazzarelli

Cavansite and Williamsite Optic Character

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

Similar to their colors, Cavansite 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, Cavansite is Not Available while Cavansite is Not Available in appearance.