mineral

Quartz (clear quartz/crystal quartz)

Quartz, silicon dioxide (SiO₂), trigonal crystal system

AI-generated identification · may be incorrect

Colorless to translucent, vitreous luster, hardness 7 Mohs, no true cleavage, conchoidal fracture, specific gravity about 2.65. The left piece is irregular and fractured; the right appears cut or naturally faceted rather than a typical complete crystal.

Identified August 7, 2026More mineral →

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Physical properties

Formation & geological history

Forms from silica-rich hydrothermal fluids, pegmatites, and cavities in igneous and metamorphic rocks; also common as veins and sedimentary grains. Quartz is widespread and spans much of Earth’s geological history.

Uses & applications

Used in glass, electronics, optical instruments, abrasives, countertops, and ornamental carvings; clear crystals are collected and sometimes used as gemstones.

Geological facts

Quartz can produce electrical charge under pressure (piezoelectricity). Natural crystal faces commonly form six-sided prisms ending in pyramidal points, which are not obvious here.

Field identification & locations

Identify by its glassy appearance, hardness, lack of cleavage, and ability to scratch ordinary glass. Around 4.6°N, 74.1°W near Bogotá, quartz-bearing veins and metamorphic/igneous rocks are plausible; the specimen may also be polished or cut, so locality alone cannot establish origin.