mineral

Chrysocolla in Cuprite (Sonora Sunrise)

Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O) with Cu2O

Hardness: 2.5-7 (variable); Color: Blue-green (Chrysocolla), Blood red (Cuprite), Black (Tenorite); Luster: Vitreous to dull; Crystal structure: Amorphous/Monoclinic; Specific Gravity: 2.0-4.0

Hardness: 2
Luster: Vitreous to dull

Identified April 7, 2026More mineral →

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Physical properties

Hardness: 2.5-7 (variable); Color: Blue-green (Chrysocolla), Blood red (Cuprite), Black (Tenorite); Luster: Vitreous to dull; Crystal structure: Amorphous/Monoclinic; Specific Gravity: 2.0-4.0

Formation & geological history

Formed in the oxidation zones of copper-rich ore bodies. It occurs as a secondary mineral where copper-bearing solutions interact with silica and oxygen.

Uses & applications

Primarily used for lapidary work, cabochons, jewelry, and as a popular collector's display specimen due to its striking color contrast.

Geological facts

This specific combination is often trade-named 'Sonora Sunrise' or 'Sonoran Sunset' because the red cuprite resembles a sunset sky and the blue-green chrysocolla resembles the landscape.

Field identification & locations

Identify in the field by the distinct 'bullseye' or vein patterns of bright turquoise-blue within a deep earthy red matrix. It is commonly found in the Milpillas Mine in Sonora, Mexico.

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