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Gedrite and Almandine Optical Properties


Almandine and Gedrite Optical Properties


Optical Properties

Luster
Fibrous, Vitreous   
Greasy, Vitreous   

Pleochroism
Weak to moderate   
None   

Dispersion
Not Available   
0.03   
15

Transparency
Transparent   
Gemmological Tables (2004) More from other references   

Refractive Index
1.625-1.718   
1.770-1.820   

Optic Character
Not Available   
Not Available   

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

Birefringence
Not Available   
Not Available   

Clarity
Transparent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Gedrite and Almandine Optic Character

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

Similar to their colors, Gedrite and Almandine 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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