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Malachite
Malachite

Almandine
Almandine



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Malachite
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Almandine

Malachite and Almandine Optical Properties

Optical Properties

Luster

Adamantine, Vitreous, Silky
Greasy, Vitreous

Pleochroism

-
None

Dispersion

0.040.03
0.005 1
👆🏻

Transparency

Opaque
-

Refractive Index

1.655-1.9091.770-1.820
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
cubic

Birefringence

0.254-9999
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Malachite and Almandine Optic Character

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

Malachite and Almandine Transparency

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