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Nepheline and Boulder Opal Optical Properties


Boulder Opal and Nepheline Optical Properties


Optical Properties

Luster
Vitreous, Greasy   
Not Available   

Pleochroism
Not Available   
AbsentWalter Schumann   

Dispersion
Not Available   
None   

Transparency
Transparent, Translucent   
Transparent, Translucent   

Refractive Index
1.529-1.547   
1.370-1.470   

Optic Character
Not Available   
Not Available   

Crystal System
Hexagonal   
Not Available   

Birefringence
0.003-0.004   
Not Available   

Clarity
Transparent   
Transparent   

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<< Physical Properties

Nepheline and Boulder Opal Optic Character

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

Similar to their colors, Nepheline and Boulder Opal 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.

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