mineral

Malachite-bearing copper ore

Malachite, Cu₂CO₃(OH)₂, likely with chrysocolla and limonite/matrix minerals

AI-generated identification · may be incorrect

Green to blue-green botryoidal, banded or earthy coatings; malachite has vitreous to silky luster, monoclinic crystals, Mohs hardness 3.5–4, and specific gravity about 3.6–4.0. The rusty brown areas likely represent iron oxides or host rock.

Identified August 17, 2026More mineral →

Explore Malachite-bearing copper ore in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Forms in the oxidized, near-surface zones of copper deposits when carbonate-rich groundwater alters primary copper sulfides. Most specimens are geologically young relative to their host deposits, commonly formed during Cenozoic weathering.

Uses & applications

Used as an ornamental stone, pigment, lapidary material, and copper ore; attractive polished pieces are collected, though this rough specimen appears primarily cabinet or educational grade.

Geological facts

Malachite commonly occurs with azurite, chrysocolla, cuprite, and limonite, and its vivid green color results from copper. Avoid ingesting dust or using it for aquaria; wash hands after handling.

Field identification & locations

Identify by vivid green banding, moderate softness, heavy feel, and an effervescent reaction to dilute hydrochloric acid; copper-mining regions such as the Democratic Republic of Congo, Zambia, Arizona, Russia, and Australia are notable sources. Confirmatory identification requires testing because chrysocolla and other copper minerals can look similar.