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Hibonite
Hibonite

Carnallite
Carnallite



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Hibonite
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Carnallite

Hibonite and Carnallite Optical Properties

Optical Properties

Luster

Vitreous
Greasy

Pleochroism

O = brownish gray; E = gray
-

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.79-1.8071.467
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Hexagonal
Orthorhombic

Birefringence

-99990.0270
0 0.296
👆🏻

Clarity

-
-

Hibonite and Carnallite Optic Character

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

Hibonite and Carnallite Transparency

Similar to their colors, Hibonite and Carnallite 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, Hibonite is while Hibonite is in appearance.