mineral

Azurite–malachite-bearing quartz or chalcedony

Cu₃(CO₃)₂(OH)₂ azurite with Cu₂CO₃(OH)₂ malachite in SiO₂-rich matrix

AI-generated identification · may be incorrect

Small tumbled or naturally rounded specimen with pale translucent quartz/chalcedony, powdery white alteration, reddish-brown staining, and blue-green copper minerals. Azurite is Mohs 3.5–4; malachite 3.5–4; quartz 7, with vitreous to earthy luster and no obvious cleavage.

Identified August 16, 2026More mineral →

Explore Azurite–malachite-bearing quartz or chalcedony 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 oxidized zones above copper sulfide deposits, where groundwater alters copper minerals; the specimen is likely a recent weathered fragment, not datable from the image. Common associated minerals include limonite, chrysocolla, and quartz.

Uses & applications

Azurite–malachite material is chiefly collected as a mineral specimen or used decoratively; azurite was historically a blue pigment, while quartz is used in glass, abrasives, and electronics. Small pieces generally have modest commercial value.

Geological facts

Blue azurite commonly alters to green malachite, producing mixed blue-green patches. The rusty red-brown areas may be iron oxides such as hematite or limonite.

Field identification & locations

Identify it by blue azurite, green malachite, copper staining, and a pale silica matrix; a streak test and hardness test can help, but avoid acids and dust. Notable sources include Morocco, Arizona, Namibia, Australia, and France.