mineral

Copper Ore (likely Malachite or Chrysocolla staining)

Copper Secondary Mineral (e.g., Cu2CO3(OH)2)

Hardness: 3.5-4.0 (Mohs scale), Color: Green to bluish-green, Luster: Dull to earthy/waxy, Crystal Structure: Monoclinic or amorphous, Specific Gravity: 3.6-4.0

Hardness: 3

Identified June 5, 2026More mineral →

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Physical properties

Hardness: 3.5-4.0 (Mohs scale), Color: Green to bluish-green, Luster: Dull to earthy/waxy, Crystal Structure: Monoclinic or amorphous, Specific Gravity: 3.6-4.0

Formation & geological history

Formed in the oxidation zones of copper deposits where copper-rich fluids react with carbonate minerals or silica. Often found in arid environments.

Uses & applications

Industrial source of copper metal, pigments, and semi-precious gemstones for jewelry and lapidary work.

Geological facts

Copper minerals like this have been used as eye makeup and pigments since Ancient Egypt. They serve as a primary indicator for miners searching for deeper copper deposits.

Field identification & locations

Identify in the field by the distinct bright green or blue-green color (patina) often coating darker host rocks. Commonly found in Arizona (USA), Chile, and the Congo.

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Nephrite Jade

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Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Biotite Schist

Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]

metamorphic