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Jet and Tortoiseshell Optical Properties


Jet
Tortoiseshell and Jet Optical Properties


Optical Properties

Luster
Waxy   
Not Available   

Pleochroism
AbsentWalter Schumann   
Not Available   

Dispersion
None   
Not Available   

Transparency
Gemmological Tables (2004) More from other references   
Gemmological Tables (2004)   

Refractive Index
1.640-1.680   
1.540-1.560   

Optic Character
Not Available   
Not Available   

Crystal System
Amorphous   
Not Available   

Birefringence
Not Available   
Not Available   

Clarity
Gemmological Tables (2004) More from other references   
OpaqueUlrich Henn and Claudio C. Milisenda   

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Jet and Tortoiseshell Optic Character

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

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

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