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Neptunite
Neptunite

Amethyst
Amethyst



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Neptunite
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Amethyst

Neptunite and Amethyst Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
x=yellow-orange
None
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
0.01
Rank: 27 (Overall)
Fluorite Optical Properties
1.4 Transparency
Translucent
Transparent, Transparent to translucent
1.5 Refractive Index
1.692-1.734
1.544-1.553
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Trigonal
1.8 Birefringence
0.0294-0.0452
0.009
1.9 Clarity
Translucent
Transparent

Neptunite and Amethyst Optic Character

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

Neptunite and Amethyst Transparency

Similar to their colors, Neptunite and Amethyst 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, Neptunite is Translucent while Neptunite is Translucent in appearance.