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Malachite
Malachite

Prasiolite
Prasiolite



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Malachite
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Prasiolite

Malachite and Prasiolite Optical Properties

Optical Properties

Luster

Adamantine, Vitreous, Silky
Vitreous

Pleochroism

-
Very weak: light green pale greenWalter Schumann

Dispersion

0.040.01
0.005 1
👆🏻

Transparency

Opaque
Transparent, Translucent

Refractive Index

1.655-1.9091.544-1.553
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Trigonal

Birefringence

0.2540.009
0 0.296
👆🏻

Clarity

-
Transparent

Malachite and Prasiolite Optic Character

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

Similar to their colors, Malachite and Prasiolite 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.