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Cryolite and Williamsite Optical Properties


Williamsite and Cryolite Optical Properties


Optical Properties

Luster
Vitreous, Greasy, Pearly   
Waxy, Silky, Resinous, Greasy   

Pleochroism
colorless.   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Gemmological Tables (2004) More from other references   
TranslucentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)   

Refractive Index
1.338-1.339   
1.530-1.575   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Not Available   

Birefringence
0.001   
Not Available   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
TranslucentHerve Nicolas Lazzarelli   

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Cryolite and Williamsite Optic Character

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

Similar to their colors, Cryolite 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, Cryolite is Gemmological Tables (2004) More from other references while Cryolite is Gemmological Tables (2004) More from other references in appearance.

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