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Rosasite and Almandine Optical Properties


Almandine and Rosasite Optical Properties


Optical Properties

Luster
Silky, Vitreous   
Greasy, Vitreous   

Pleochroism
Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue   
None   

Dispersion
Not Available   
0.03   
15

Transparency
Not Available   
Gemmological Tables (2004) More from other references   

Refractive Index
1.672-1.688   
1.770-1.820   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
cubic   

Birefringence
0.139-0.143   
Not Available   

Clarity
Not Available   
TransparentUlrich Henn and Claudio C. Milisenda   

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Rosasite and Almandine Optic Character

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

Similar to their colors, Rosasite 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, Rosasite is Not Available while Rosasite is Not Available in appearance.

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