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Achroite
Achroite

Neptunite
Neptunite



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Neptunite

Achroite and Neptunite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous
1.2 Pleochroism
Not Available
x=yellow-orange
1.5 Dispersion
Albite Optical ..
0.02
Rank: 22 (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.15 Transparency
Transparent, Translucent
Translucent
1.16 Refractive Index
1.614-1.666
1.692-1.734
1.17 Optic Character
Not Available
Not Available
1.18 Crystal System
Not Available
monoclinic
1.19 Birefringence
0.014-0.040
0.0294-0.0452
1.20 Clarity
Transparent
Translucent

Achroite and Neptunite Optic Character

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

Achroite and Neptunite Transparency

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