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Villiaumite and Anhydrite Optical Properties


Anhydrite and Villiaumite Optical Properties


Optical Properties

Luster
Not Available   
Pearly, Greasy   

Pleochroism
Yellow to pink/deep carmineMichael O’Donoghue   
For violet varieties   

Dispersion
Not Available   
0.01   
27

Transparency
Gemmological Tables (2004) More from other references   
Transparent   

Refractive Index
1.328-1.332   
1.570-1.614   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Orthorhombic   

Birefringence
Not Available   
0.042-0.044   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Transparent   

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Villiaumite and Anhydrite Optic Character

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

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

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