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Fluorite
Fluorite

Polyhalite
Polyhalite



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Fluorite
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Polyhalite

Fluorite and Polyhalite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Resinous
1.2 Pleochroism
AbsentWalter Schumann
Not Available
1.3 Dispersion
0.01NA
Achroite
0.007 1
1.4 Transparency
Transparent, Translucent, Transparent to translucent
Not Available
1.5 Refractive Index
1.432-1.4361.546-1.548
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
cubic
Triclinic
1.8 Birefringence
Not Available0.021
Achroite
0 0.296
1.9 Clarity
Transparent
Not Available

Fluorite and Polyhalite Optic Character

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

Fluorite and Polyhalite Transparency

Similar to their colors, Fluorite and Polyhalite 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, Fluorite is Translucent, Transparent and Transparent to translucent while Fluorite is Translucent, Transparent and Transparent to translucent in appearance.