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Hematite
Hematite

Cryolite
Cryolite



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Hematite
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Cryolite

Hematite and Cryolite Optical Properties

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Optical Properties

Luster

-
Vitreous, Greasy, Pearly

Pleochroism

O = brownish red; E = yellowish red
colorless.

Dispersion

0.050.01
0.005 1
👆🏻

Transparency

OpaqueHerve Nicolas Lazzarelli
-

Refractive Index

2.690-3.2201.338-1.339
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
monoclinic

Birefringence

0.2800.001
0 0.296
👆🏻

Clarity

OpaqueHerve Nicolas Lazzarelli
TransparentUlrich Henn and Claudio C. Milisenda

Hematite and Cryolite Optic Character

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

Hematite and Cryolite Transparency

Similar to their colors, Hematite and Cryolite 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, Hematite is OpaqueHerve Nicolas Lazzarelli while Hematite is OpaqueHerve Nicolas Lazzarelli in appearance.