mineral

Chrysocolla on Quartz with Iron Oxides

Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)

Hardness: 2-4 (Chrysocolla) on 7 (Quartz matrix); Color: Cyan/blue-green staining on white/rusty host; Luster: Vitreous to earthy; Crystal structure: Amorphous/Monoclinic; Specific gravity: 2.0-2.4

Hardness: 2-4 (Chrysocolla) on 7 (Quartz matrix)
Color: Cyan/blue-green staining on white/rusty host
Luster: Vitreous to earthy

Identified May 12, 2026More mineral →

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Physical properties

Hardness: 2-4 (Chrysocolla) on 7 (Quartz matrix); Color: Cyan/blue-green staining on white/rusty host; Luster: Vitreous to earthy; Crystal structure: Amorphous/Monoclinic; Specific gravity: 2.0-2.4

Formation & geological history

Secondary mineral formed in the oxidation zones of copper ore bodies. It occurs from the weathering of primary copper minerals like chalcopyrite or bornite, often infiltrating quartz veins.

Uses & applications

Primarily collected as a mineral specimen. High-quality gem-grade specimens are used in lapidary work for cabochons and jewelry. It is also a minor ore of copper.

Geological facts

Chrysocolla has been used since ancient times for soldering gold. The name is derived from the Greek terms 'chrysos' (gold) and 'kolla' (glue).

Field identification & locations

Identify by its distinctive blue-green color and association with iron staining (limonite/hematite). Commonly found in arid regions like Arizona, Chile, and the Democratic Republic of Congo near copper mines.

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