Where is Azurite with Limonite found?
Azurite (Cu3(CO3)2(OH)2) with Limonite (FeO(OH)·nH2O)
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Open the appAzurite with Limonite occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Azurite with Limonite
Bisbee, Arizona, USA
Historically famous for exceptional azurite specimens, often found with limonite and other copper minerals.
Tsumeb, Namibia
Renowned for world-class azurite crystals, frequently associated with various iron oxides including limonite.
Chessy-les-Mines, Rhône, France
Type locality for azurite, where it occurs in association with limonite and malachite.
Morenci, Arizona, USA
Large porphyry copper deposit with significant supergene enrichment, yielding azurite and limonite.
La Sal, Utah, USA
Known for copper-uranium deposits where azurite and limonite can be found.
Collecting tips
- Look for Copper Deposits. Focus your search on areas known for copper mineralization, particularly the oxidized caps of sulfide deposits.
- Identify Oxidized Zones. These minerals form in the upper, weathered portions of ore bodies where oxygenated waters have penetrated. Look for gossans (iron-rich, weathered rock outcrops).
- Observe Color Contrasts. The distinct blue of azurite against the yellow-brown to reddish-brown of limonite is a key visual indicator.
- Check for Associated Minerals. Azurite and limonite often occur with malachite (green), chrysocolla (blue-green), native copper, and various iron oxides.
- Test for Carbonate Reaction. Azurite will effervesce (fizz) with dilute hydrochloric acid due to its carbonate content. Limonite will not.
Quick Check
- Color:
- Deep blue (azurite) with yellow-brown to reddish-brown (limonite)
- Luster:
- Vitreous to dull (azurite); dull, earthy, or submetallic (limonite)
- Streak:
- Light blue (azurite); yellowish-brown (limonite)
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