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Rosasite and Variscite Optical Properties


Variscite and Rosasite Optical Properties


Optical Properties

Luster
Silky, Vitreous  
Vitreous, Waxy  

Pleochroism
Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue  
-  

Dispersion
0.03  
99+
0.01  
99+

Transparency
-  
Translucent, Opaque . May be translucent when backlit on the edges.  

Refractive Index
1.672-1.688  
1.560-1.594  

Optic Character
-  
-  

Crystal System
monoclinic  
Orthorhombic  

Birefringence
0.139-0.143  
0.031  

Clarity
-  
Translucent  

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Rosasite and Variscite Optic Character

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

Similar to their colors, Rosasite and Variscite 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, Rosasite is while Rosasite is in appearance.

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