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Zoisite
Zoisite

Nepheline
Nepheline



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Zoisite
X
Nepheline

Zoisite and Nepheline Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Greasy
1.2 Pleochroism
X = pale pink to red-violet; Y = nearly colorless to bright pink or deep blue; Z = pale yellow to yellow-green
Not Available
1.3 Dispersion
0.02NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent, Opaque . May be translucent in thin backlit sections.
Transparent, Translucent
1.5 Refractive Index
1.685-1.7071.529-1.547
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Hexagonal
1.8 Birefringence
0.006-0.0180.003-0.004
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Zoisite and Nepheline Optic Character

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

Zoisite and Nepheline Transparency

Similar to their colors, Zoisite and Nepheline 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, Zoisite is Opaque . May be translucent in thin backlit sections., Translucent and Transparent while Zoisite is Opaque . May be translucent in thin backlit sections., Translucent and Transparent in appearance.