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Zoisite
Zoisite

Williamsite
Williamsite



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Zoisite
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Williamsite

Zoisite and Williamsite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Waxy, Silky, Resinous, Greasy
1.4 Pleochroism
X = pale pink to red-violet; Y = nearly colorless to bright pink or deep blue; Z = pale yellow to yellow-green
Not Available
1.6 Dispersion
0.02NA
Fluorite Optical Properties
0.007 1
1.12 Transparency
Transparent, Translucent, Opaque . May be translucent in thin backlit sections.
TranslucentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
1.13 Refractive Index
1.685-1.7071.530-1.575
Agate Opal
1 3.25
1.14 Optic Character
Not Available
Not Available
1.15 Crystal System
Orthorhombic
Not Available
1.16 Birefringence
0.006-0.018Not Available
Achroite
0 0.296
1.17 Clarity
Transparent
TranslucentHerve Nicolas Lazzarelli

Zoisite and Williamsite Optic Character

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

Zoisite and Williamsite Transparency

Similar to their colors, Zoisite 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, Zoisite is Opaque . May be translucent in thin backlit sections., Translucent and Transparent while Zoisite is Opaque . May be translucent in thin backlit sections., Translucent and Transparent in appearance.