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Malachite
Malachite

Ammolite
Ammolite



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Malachite
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Ammolite

Malachite and Ammolite Optical Properties

Optical Properties

Luster

Adamantine, Vitreous, Silky
Silky, Vitreous

Pleochroism

-
None

Dispersion

0.040.01
0.005 1
👆🏻

Transparency

Opaque
-

Refractive Index

1.655-1.9091.520-1.670
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Trigonal

Birefringence

0.2540.135-0.145
0 0.296
👆🏻

Clarity

-
-

Malachite and Ammolite Optic Character

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

Similar to their colors, Malachite and Ammolite 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.