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Almandine
Almandine

Hematite
Hematite



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Almandine
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Hematite

Almandine and Hematite Optical Properties

Optical Properties

Luster

Greasy, Vitreous
-

Pleochroism

None
O = brownish red; E = yellowish red

Dispersion

0.030.05
0.005 1
👆🏻

Transparency

-
OpaqueHerve Nicolas Lazzarelli

Refractive Index

1.770-1.8202.690-3.220
1 3.25
👆🏻

Optic Character

-
-

Crystal System

cubic
Trigonal

Birefringence

-99990.280
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
OpaqueHerve Nicolas Lazzarelli

Almandine and Hematite Optic Character

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

Almandine and Hematite Transparency

Similar to their colors, Almandine and Hematite 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, Almandine is while Almandine is in appearance.