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Carnallite
Carnallite

Sillimanite
Sillimanite



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Carnallite
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Sillimanite

Carnallite and Sillimanite Optical Properties

1 Optical Properties
1.1 Luster
Greasy
Vitreous, Subadamantine, Silky
1.2 Pleochroism
Not Available
Colourless to pale brown to yellow
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
Transparent, Translucent
1.5 Refractive Index
1.4671.653-1.685
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Orthorhombic
1.8 Birefringence
0.02700.020-0.022
Achroite
0 0.296
1.9 Clarity
Not Available
Transparent

Carnallite and Sillimanite Optic Character

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

Carnallite and Sillimanite Transparency

Similar to their colors, Carnallite and Sillimanite 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, Carnallite is Not Available while Carnallite is Not Available in appearance.