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Gibbsite
Gibbsite

Hackmanite
Hackmanite



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Gibbsite
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Hackmanite

Gibbsite and Hackmanite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous
1.2 Pleochroism
colorless.
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
Gemmological Tables (2004)
1.5 Refractive Index
Not Available1.483-1.487
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Not Available
1.8 Birefringence
Not AvailableNot Available
Achroite
0 0.296
1.9 Clarity
Not Available
Transparent

Gibbsite and Hackmanite Optic Character

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

Similar to their colors, Gibbsite and Hackmanite 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.