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Hurlbutite
Hurlbutite

Neptunite
Neptunite



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Hurlbutite
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Neptunite

Hurlbutite and Neptunite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
Not Available
x=yellow-orange
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Translucent
1.5 Refractive Index
1.595-1.6041.692-1.734
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a
monoclinic
1.8 Birefringence
0.0090.0294-0.0452
Achroite
0 0.296
1.9 Clarity
Transparent
Translucent

Hurlbutite and Neptunite Optic Character

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

Hurlbutite and Neptunite Transparency

Similar to their colors, Hurlbutite 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, Hurlbutite is Transparent while Hurlbutite is Transparent in appearance.