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Sapphire
Sapphire

Gibbsite
Gibbsite



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Sapphire
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Gibbsite

Sapphire and Gibbsite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous, Adamantine, Vitreous, Adamantine
Vitreous, Pearly
1.2 Pleochroism
Strong
colorless.
1.3 Dispersion
0.02NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent, Transparent to opaque
Not Available
1.5 Refractive Index
1.762-1.788Not Available
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
monoclinic
1.8 Birefringence
0.008-0.009Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
Not Available

Sapphire and Gibbsite Optic Character

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

Sapphire and Gibbsite Transparency

Similar to their colors, Sapphire and Gibbsite 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, Sapphire is Translucent, Transparent and Transparent to opaque while Sapphire is Translucent, Transparent and Transparent to opaque in appearance.