Home
Gemstones


Demantoid and Jet Optical Properties


Jet
Jet and Demantoid Optical Properties


Optical Properties

Luster
Adamantine   
Waxy   

Pleochroism
None   
AbsentWalter Schumann   

Dispersion
Not Available   
None   

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

Refractive Index
1.880-1.890   
1.640-1.680   

Optic Character
Not Available   
Not Available   

Crystal System
cubic   
Amorphous   

Birefringence
Not Available   
Not Available   

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

Benefits >>
<< Physical Properties

Demantoid and Jet Optic Character

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

Compare Green Gemstones

Demantoid and Jet Transparency

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

Green Gemstones

Green Gemstones


Compare Green Gemstones