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Nepheline
Nepheline

Sunstone
Sunstone



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Nepheline
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Sunstone

Nepheline and Sunstone Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Greasy
Vitreous
1.2 Pleochroism
Not Available
Weak or absentWalter Schumann
1.3 Dispersion
NANone
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
Transparent, Translucent, Transparent to translucent
1.5 Refractive Index
1.529-1.5471.53-1.55
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
Triclinic
1.8 Birefringence
0.003-0.0040.007-0.010
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent to translucent

Nepheline and Sunstone Optic Character

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

Similar to their colors, Nepheline and Sunstone 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.