mineral

Iron-stained quartz cluster (likely druzy quartz)

Quartz, SiO₂, with iron-oxide staining

AI-generated identification · may be incorrect

White, opaque-to-translucent quartz matrix topped with honey-brown sparkling crystals; vitreous luster and trigonal crystal structure. Mohs hardness 7; no cleavage, with uneven to conchoidal fracture. The photo does not show enough detail for definitive identification.

Identified September 28, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystals commonly grow in cavities or fractures from silica-rich fluids; iron oxides can later coat or stain them brown. This process occurs in many rock types over a wide range of geological ages.

Uses & applications

Quartz clusters are collected as decorative mineral specimens; quartz is also widely used in glass, electronics, and industrial applications.

Geological facts

The brown color may come from goethite or hematite rather than from the quartz itself.

Field identification & locations

Look for glassy sparkle, hardness sufficient to scratch glass, and lack of cleavage; quartz clusters occur worldwide. Exact locality and matrix cannot be established from the image.