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Malachite

JewelryWiki Editorial·2 sources·Reviewed 2026-07-31
Malachite specimen
Malachite specimen. JJ Harrison (https://www.jjharrison.com.au/), CC BY-SA 3.0 · Wikimedia Commons

Extreme birefringence and a copper carbonate composition — soft, and sensitive to acids and heat.

Properties

PropertyValueAuthority
Refractive index1.655–1.909 [1]—
Specific gravity3.25–4.10 [1]—
Crystal systemMonoclinic [2]—

Sources

  1. International Gem Society — reference charts (Mohs hardness, specific gravity, refractive index) — International Gem Society (IGS reference charts)
  2. Wikipedia — mineral article infoboxes (crystal system) — Wikipedia contributors (Wikipedia mineral infoboxes)
Malachite — JewelryWiki