Azurite

Cu3(CO3)2(OH)2

Azurite appears as small, deep blue, rounded aggregates or 'raisins' within a complex matrix of other minerals. The individual crystals are tiny, about 1/8 mm on edge.

Azurite Physical Properties

Mohs Hardness

3.5

Crystal System

monoclinic

Luster

vitreous

Streak Color

light blue

Cleavage

good on {011}, fair on {100}

Fracture

conchoidal

Specific Gravity

3.8

Colors

azure blue, dark blue

Transparency

transparent to translucent

Type Locality

La Amorosa mine, San Rafael claim, Villahermosa del Rio, Castellón, Valencian Community, Spain

Mineral Group

carbonates

Uses

pigment, minor copper ore, collector's item, jewelry

Associated Minerals

zincolivenite, theisite, claraite, malachite, cuprite, chrysocolla

Rarity

common

Geological Context

Azurite is a secondary copper mineral formed in the oxidized zones of copper ore deposits, typically in arid or semi-arid climates. It results from the reaction of copper-bearing solutions with carbonate rocks.

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Related Specimens

Arsenopyrite

Axinite

Bornite

Epidote

Diaspore

Chabazite