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Grossular
Grossular

Carnallite
Carnallite



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Grossular
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Carnallite

Grossular and Carnallite Optical Properties

Optical Properties

Luster

Greasy, Vitreous
Greasy

Pleochroism

None
-

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.730-1.7601.467
1 3.25
👆🏻

Optic Character

-
-

Crystal System

cubic
Orthorhombic

Birefringence

0.0200.0270
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
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Grossular and Carnallite Optic Character

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

Grossular and Carnallite Transparency

Similar to their colors, Grossular 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, Grossular is while Grossular is in appearance.