mineral

Chrysocolla in Jasper (Chryso-Jasper)

Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O (Chrysocolla) + SiO2 (Jasper)

Hardness: 6.5-7 (Jasper base); Color: Brownish-tan matrix with turquoise-blue/green secondary mineralization; Luster: Dull to waxy; Structure: Amorphous (Chrysocolla) / Microcrystalline (Jasper)

Hardness: 6
Luster: Dull to waxy

Identified February 25, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Jasper base); Color: Brownish-tan matrix with turquoise-blue/green secondary mineralization; Luster: Dull to waxy; Structure: Amorphous (Chrysocolla) / Microcrystalline (Jasper)

Formation & geological history

Formed as a secondary mineral in the oxidation zones of copper ore bodies. Deeply oxidized hydrothermal fluids permeate host rocks (like Jasper) and deposit copper silicates within fractures and cavities.

Uses & applications

Predominantly used as a lapidary material for cabochons, beads, and decorative carvings; also a popular specimen for mineral collectors due to the contrast in colors.

Geological facts

Chrysocolla is often confused with turquoise but can be distinguished by its higher water content and lower hardness; when it occurs within quartz or jasper, the overall hardness of the specimen increases significantly.

Field identification & locations

Identify by looking for characteristic blue-green copper staining within a hard, silica-rich host rock. Commonly found in arid regions with major copper deposits like Arizona (USA), Chile, and the DRC.

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