mineral

Chrysocolla in Quartz (Quantum Quattro variant)

Hydrated copper silicates (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O) often mixed with SiO2

Hardness: 2-4 (Chrysocolla) but up to 7 (if quartz-rich); Color: Cyan, turquoise-blue, and green with dark matrix; Luster: Vitreous to dull; Structure: Amorphous or microcrystalline; Specific Gravity: 2.0-2.4.

Hardness: 2-4 (Chrysocolla) but up to 7 (if quartz-rich)
Color: Cyan, turquoise-blue, and green with dark matrix
Luster: Vitreous to dull

Identified March 24, 2026More mineral →

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Physical properties

Formation & geological history

Formed in the oxidation zones of copper ore bodies where copper-rich solutions react with silica and oxygen. These specimens are often found in arid climates and secondary enrichment zones of copper deposits.

Uses & applications

Used primarily as a gemstone for jewelry (cabochons), ornamental carvings, and by mineral collectors for its vibrant color.

Geological facts

Chrysocolla is often confused with turquoise but contains more water and is generally softer. It has been used since ancient times for soldering gold, which is where its name (Greek for 'gold glue') originates.

Field identification & locations

Field identification involves checking for the characteristic electric-blue color, its inability to react with HCl (unlike malachite), and its tendency to stick to the tongue due to its porous nature. Commonly found in Arizona (USA), Chile, and the DRC.

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