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Nepheline
Nepheline

Sard
Sard



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Nepheline
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Sard

Nepheline and Sard Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous, Greasy
Waxy
1.2 Pleochroism
Not Available
AbsentWalter Schumann
1.3 Dispersion
NANone
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
Translucent
1.5 Refractive Index
1.529-1.5471.535-1.539
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
Not Available
1.8 Birefringence
0.003-0.0040.008-0.010
Achroite
0 0.296
1.9 Clarity
Transparent
Translucent

Nepheline and Sard Optic Character

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

Nepheline and Sard Transparency

Similar to their colors, Nepheline and Sard 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.