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Gedrite and Anhydrite Optical Properties


Anhydrite and Gedrite Optical Properties


Optical Properties

Luster
Vitreous  
Pearly, Greasy  

Pleochroism
Weak to moderate  
For violet varieties  

Dispersion
0.02  
99+
0.01  
99+

Transparency
Transparent  
Transparent  

Refractive Index
1.625-1.718  
1.570-1.614  

Optic Character
-  
-  

Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma  
Orthorhombic  

Birefringence
-9999  
0.042-0.044  

Clarity
Transparent  
Transparent  

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Gedrite and Anhydrite Optic Character

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

Similar to their colors, Gedrite 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, Gedrite is Transparent while Gedrite is Transparent in appearance.

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