Home
Gemstones


Nepheline and Obsidian Optical Properties


Obsidian and Nepheline Optical Properties


Optical Properties

Luster
Vitreous, Greasy   
Vitreous   

Pleochroism
Not Available   
AbsentWalter Schumann   

Dispersion
Not Available   
0.01   
29

Transparency
Transparent, Translucent   
Transparent, Translucent   

Refractive Index
1.529-1.547   
1.450-1.550   

Optic Character
Not Available   
Not Available   

Crystal System
Hexagonal   
Amorphous   

Birefringence
0.003-0.004   
Not Available   

Clarity
Transparent   
Transparent   

Benefits >>
<< Physical Properties

Nepheline and Obsidian Optic Character

Nepheline and Obsidian optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Nepheline and Obsidian 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 Nepheline and Obsidian 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 Red Gemstones

Nepheline and Obsidian Transparency

Similar to their colors, Nepheline and Obsidian 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, Nepheline is Translucent and Transparent while Nepheline is Translucent and Transparent in appearance.

Red Gemstones

Red Gemstones


Compare Red Gemstones