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Gibbsite
Gibbsite

Polyhalite
Polyhalite



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Gibbsite
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Polyhalite

Gibbsite and Polyhalite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous, Resinous
1.2 Pleochroism
colorless.
Not Available
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Not Available
Not Available
1.5 Refractive Index
Not Available
1.546-1.548
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Triclinic
1.8 Birefringence
Not Available
0.021
1.9 Clarity
Not Available
Not Available

Gibbsite and Polyhalite Optic Character

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

Gibbsite and Polyhalite Transparency

Similar to their colors, Gibbsite 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, Gibbsite is Not Available while Gibbsite is Not Available in appearance.