mineral
Malachite
Copper Carbonate Hydroxide, Cu2CO3(OH)2
AI-generated identification · may be incorrectHardness 3.5-4 on Mohs scale; distinctive light and dark green concentric bands; botryoidal habit with silky to vitreous luster; monoclinic crystal system.
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Physical properties
Hardness 3.5-4 on Mohs scale; distinctive light and dark green concentric bands; botryoidal habit with silky to vitreous luster; monoclinic crystal system.
Formation & geological history
Forms as a secondary mineral in the oxidation zone of copper ore deposits, often precipitating from hydrothermal solutions in limestone caverns.
Uses & applications
Widely used as an ornamental gemstone, for decorative carvings, and historically as a green mineral pigment.
Geological facts
Malachite has been mined for over 4,000 years, notably in the Great Orme of Wales and the Ural Mountains of Russia.
Field identification & locations
Easily identified by its characteristic green banding and effervescence when exposed to hydrochloric acid. Common sources include the Democratic Republic of Congo, Australia, and the southwestern United States.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous