mineral

Raw quartz crystal pendant

Quartz (silicon dioxide, SiO₂), likely milky or cloudy quartz

AI-generated identification · may be incorrect

Hardness 7 Mohs; translucent white to colorless, with a vitreous luster and irregular/conchoidal fracture. Quartz is trigonal and commonly forms hexagonal prismatic crystals, though this specimen appears naturally irregular and partly translucent.

Identified September 15, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids, pegmatites, and igneous cavities; its exact geological age and locality cannot be determined from the image. The copper wire and chain are human-made jewelry components.

Uses & applications

Used widely in glass, ceramics, abrasives, electronics, clocks, and decorative objects; attractive clear crystals are used in jewelry and mineral collecting. This wire-wrapped pendant has mainly ornamental value.

Geological facts

Cloudiness commonly results from microscopic fluid inclusions, fractures, or other mineral inclusions. Quartz is one of Earth’s most abundant and chemically durable minerals.

Field identification & locations

Identify by its glassy appearance, lack of obvious cleavage, conchoidal fracture, and ability to scratch ordinary glass; a steel nail should not scratch it. Common sources include Brazil, Madagascar, the United States, and worldwide hydrothermal and pegmatite deposits.