mineral

Chrysocolla in Cuprite (Sonoran Sunrise)

Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O) (Chrysocolla) and Cu2O (Cuprite)

Hardness: 2-4 (Chrysocolla) to 3.5-4 (Cuprite); Color: Cyan blue and dark reddish-brown/black; Luster: Vitreous to dull; Crystal Structure: Amorphous/Orthorhombic (Chrysocolla) and Isometric (Cuprite); Cleavage: None/Conchoidal fracture.

Hardness: 2-4 (Chrysocolla) to 3
Color: Cyan blue and dark reddish-brown/black
Luster: Vitreous to dull

Identified March 18, 2026More mineral →

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Physical properties

Formation & geological history

Secondary mineral formed in the oxidation zones of copper ore bodies. It occurs as a result of water interacting with copper minerals and silica in arid environments. Often found in deposits dating back to the Proterozoic to Cenozoic eras.

Uses & applications

Predominantly used as a gemstone for jewelry (cabochons), lapidary art, and as a collector's specimen. It is also a minor ore of copper.

Geological facts

This specific combination from Mexico is often marketed as 'Sonoran Sunrise' or 'Sonoran Sunset'. It is valued for the striking contrast between the bright blue-green chrysocolla and the deep red or black cuprite/tenorite matrix.

Field identification & locations

Identify in the field by its distinct 'bullseye' or mottled blue-on-red pattern and association with other copper minerals like Malachite. Found primarily in Sonora, Mexico, and copper mines in Arizona, USA. Collectors look for high contrast and lack of fractures.

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