Malachite

Malachite
Copper Carbonate Hydroxide, Cu2CO3(OH)2
Crystal System: Monoclinic
Hardness: 3.5-4.0
Density: 4.0

Malachite occurs as an alteration product in the oxidized zones of copper deposits. It is associated with azurite, calcite, chrysocolla, cuprite, tenorite and limonite. Pseudomorphs of malachite after azurite are common. Malachite also occurs in sandstones as disseminations deposited by meteoric waters.

Malachite sometimes occurs as acicular crystals in fibrous, radiating masses. It commonly occurs as a green coating on other copper minerals and as emerald-green botryoidal masses with concretionary, banded structures.


Rocks from WSU Thomas Edison Mineral Collection

Index of Specimen Images

Table of Contents

bkeller@rockhounds.com 7/3/95