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Demantoid and Ammonite Optical Properties


Ammonite and Demantoid Optical Properties


Optical Properties

Luster
Adamantine   
Not Available   

Pleochroism
None   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Gemmological Tables (2004)   
Not Available   

Refractive Index
1.880-1.890   
Not Available   

Optic Character
Not Available   
Not Available   

Crystal System
cubic   
Trigonal   

Birefringence
Not Available   
Not Available   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Not Available   

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<< Physical Properties

Demantoid and Ammonite Optic Character

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

Similar to their colors, Demantoid and Ammonite 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, Demantoid is Gemmological Tables (2004) while Demantoid is Gemmological Tables (2004) in appearance.

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