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Almandine and Coral Optical Properties


Coral and Almandine Optical Properties


Optical Properties

Luster
Greasy, Vitreous   
Not Available   

Pleochroism
None   
AbsentWalter Schumann   

Dispersion
0.03   
15
None   

Transparency
Gemmological Tables (2004) More from other references   
Translucent   

Refractive Index
1.770-1.820   
1.486-1.658   

Optic Character
Not Available   
Not Available   

Crystal System
cubic   
Trigonal   

Birefringence
Not Available   
0.160-0.172   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Translucent   

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Almandine and Coral Optic Character

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

Similar to their colors, Almandine and Coral 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, Almandine is Gemmological Tables (2004) More from other references while Almandine is Gemmological Tables (2004) More from other references in appearance.

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