mineral

Quartz Druzy on Matrix (with Copper Mineralization)

Silicon Dioxide (SiO2) with Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O)

Hardness: 7 (Quartz); Color: Clear to white crystals on tan/gray matrix with turquoise-green staining; Luster: Vitreous/glassy; Structure: Hexagonal crystals; Cleavage: None (Conchoidal fracture).

Hardness: 7 (Quartz)
Luster: Vitreous/glassy

Identified April 22, 2026More mineral →

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Physical properties

Hardness: 7 (Quartz); Color: Clear to white crystals on tan/gray matrix with turquoise-green staining; Luster: Vitreous/glassy; Structure: Hexagonal crystals; Cleavage: None (Conchoidal fracture).

Formation & geological history

Formed through hydrothermal processes where silica-rich fluids cooled in cavities or fissures of host rock. The green staining indicates secondary copper mineralization, common in oxidation zones of copper deposits.

Uses & applications

Primarily for mineral collecting, lapidary use, and as decorative display specimens. Quartz is also used in electronics and glass manufacturing.

Geological facts

Rocks with this specific combination of quartz and copper minerals are often found in tailings of old mines. The tiny, sparkling crystals on the surface are called 'druzy'.

Field identification & locations

Identify by the sparkling crystal coating (druzy) and typical 7 hardness. Presence of blue-green crusts indicates copper content. Found in arid regions like Arizona, USA, or Northern Chile.

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