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Hurlbutite
Hurlbutite

Polyhalite
Polyhalite



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Hurlbutite
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Polyhalite

Hurlbutite and Polyhalite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Resinous
1.2 Pleochroism
Not Available
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Not Available
1.5 Refractive Index
1.595-1.6041.546-1.548
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
Triclinic
1.8 Birefringence
0.0090.021
Achroite
0 0.296
1.9 Clarity
Transparent
Not Available

Hurlbutite and Polyhalite Optic Character

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

Similar to their colors, Hurlbutite and Polyhalite 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.