mineral

Raw quartz crystal

Quartz (silicon dioxide, SiO₂), likely milky or iron-stained quartz

AI-generated identification · may be incorrect

Typically Mohs hardness 7, vitreous luster, white to translucent appearance, and a hexagonal crystal structure; lacks true cleavage and breaks conchoidally. The specimen appears massive and fractured rather than showing complete crystal faces, with cream-orange staining likely from iron oxides or inclusions.

Identified August 17, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids, pegmatites, and igneous veins, or forms in metamorphic and sedimentary environments. Its age cannot be determined from the photograph and depends on its host rock and locality.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and engineered stone; clear crystals are used for jewelry and collecting. This rough piece has modest decorative or educational value.

Geological facts

Quartz is one of Earth’s most abundant minerals and is highly resistant to weathering. Its translucent appearance results from microscopic fractures, fluid inclusions, and fine mineral impurities.

Field identification & locations

Identify it by its glassy luster, hardness sufficient to scratch ordinary glass, lack of cleavage, and irregular/conchoidal fracture. Common localities include hydrothermal veins, granite pegmatites, quartz-rich metamorphic rocks, and alluvial deposits.