mineral
Copper Ore (Malachite and Limonite bearing)
Cuprite, Malachite, and Limonite mixture
Hardness ranges from 3.5 to 4 for malachite and 5 to 5.5 for limonite. Color is a mix of earthy green, brown, and rust-orange. Luster is dull to earthy. Crystal structure is amorphous/massive or monoclinic microcrystalline aggregates.
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Physical properties
Hardness ranges from 3.5 to 4 for malachite and 5 to 5.5 for limonite. Color is a mix of earthy green, brown, and rust-orange. Luster is dull to earthy. Crystal structure is amorphous/massive or monoclinic microcrystalline aggregates.
Formation & geological history
Formed through the oxidation and weathering of primary copper sulfide ore deposits in hydrothermal or sedimentary environments.
Uses & applications
Used primarily as ore specimens for mineral collections and educational purposes, historically for copper extraction.
Geological facts
Specimens like this show the classic weathering profile of copper deposits where green copper carbonates (malachite/chrysocolla) mix with iron oxides (limonite/goethite).
Field identification & locations
Can be identified by the characteristic vibrant green copper staining mixed with brown iron oxide matrix. Commonly found in oxidized zones of copper mining districts worldwide.
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