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Gibbsite and Hanksite Optical Properties


Hanksite and Gibbsite Optical Properties


Optical Properties

Luster
Vitreous, Pearly   
Vitreous   

Pleochroism
colorless.   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Not Available   
Not Available   

Refractive Index
Not Available   
1.481   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Hexagonal   

Birefringence
Not Available   
0.020   

Clarity
Not Available   
Not Available   

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Gibbsite and Hanksite Optic Character

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

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Gibbsite and Hanksite Transparency

Similar to their colors, Gibbsite and Hanksite 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.

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Grey Gemstones


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