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Coral and Jet Optical Properties


Jet
Jet and Coral Optical Properties


Optical Properties

Luster
Not Available   
Waxy   

Pleochroism
AbsentWalter Schumann   
AbsentWalter Schumann   

Dispersion
None   
None   

Transparency
Translucent   
Gemmological Tables (2004) More from other references   

Refractive Index
1.486-1.658   
1.640-1.680   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Amorphous   

Birefringence
0.160-0.172   
Not Available   

Clarity
Translucent   
Gemmological Tables (2004) More from other references   

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<< Physical Properties

Coral and Jet Optic Character

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

Similar to their colors, Coral and Jet 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, Coral is Translucent while Coral is Translucent in appearance.

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