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Malachite
Malachite

Antigorite
Antigorite



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Malachite
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Antigorite

Malachite and Antigorite Optical Properties

Optical Properties

Luster

Adamantine, Vitreous, Silky
Waxy, Silky, Resinous, Greasy

Pleochroism

-
pale greenish yellow

Dispersion

0.040.02
0.005 1
👆🏻

Transparency

Opaque
Translucent

Refractive Index

1.655-1.9091.530-1.575
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Monoclinic Domatic H-M Symbol (m) Space Group: Cm

Birefringence

0.254-9999
0 0.296
👆🏻

Clarity

-
Translucent

Malachite and Antigorite Optic Character

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

Similar to their colors, Malachite and Antigorite 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.