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Anhydrite
Anhydrite

Gedrite
Gedrite



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Anhydrite
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Gedrite

Anhydrite and Gedrite Optical Properties

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1 Optical Properties
1.1 Luster
Pearly, Greasy
Fibrous, Vitreous
1.2 Pleochroism
For violet varieties
Weak to moderate
1.3 Dispersion
0.01NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Transparent
1.5 Refractive Index
1.570-1.6141.625-1.718
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
1.8 Birefringence
0.042-0.044Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Anhydrite and Gedrite Optic Character

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

Anhydrite and Gedrite Transparency

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