mineral
Polished banded malachite
Malachite, Cu₂CO₃(OH)₂
AI-generated identification · may be incorrectOpaque, deep-green bands with a polished vitreous-to-silky luster; monoclinic crystal structure and Mohs hardness 3.5–4. The rounded form appears shaped and polished; its exact identity is uncertain from the image alone.
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Physical properties
Opaque, deep-green bands with a polished vitreous-to-silky luster; monoclinic crystal structure and Mohs hardness 3.5–4. The rounded form appears shaped and polished; its exact identity is uncertain from the image alone.
Formation & geological history
A secondary copper carbonate mineral formed as copper deposits weather near the surface, commonly in oxidized zones of copper ores. Malachite forms across many geological ages.
Uses & applications
Used for carvings, beads, cabochons, and decorative objects; historically used as a copper ore and pigment.
Geological facts
Distinctive concentric or wavy green banding is often called botryoidal or banded malachite. Major sources include the Democratic Republic of the Congo, Zambia, Russia, and Australia.
Field identification & locations
Look for alternating light and dark green bands and relatively low hardness; avoid acid or abrasive tests, as malachite is soft and acid-sensitive. The photo shows a small polished specimen, but scale and provenance are unavailable.
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