mineral

Clear quartz crystal point

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Colorless, transparent to translucent crystal with vitreous luster and likely hexagonal prismatic structure; Mohs hardness 7, no cleavage, conchoidal fracture, and specific gravity about 2.65. The specimen appears naturally terminated but may be partially chipped or polished.

Identified September 7, 2026More mineral →

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Physical properties

Formation & geological history

Forms in hydrothermal veins, cavities, pegmatites, and sedimentary environments as silica-rich fluids cool; individual crystals can form over long geological intervals from Precambrian to modern ages.

Uses & applications

Used for metaphysical collecting, ornament, optics, electronics, watches, glassmaking, and abrasives; clear large crystals have modest display value.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly forms six-sided prisms ending in pyramidal faces. Its piezoelectric behavior enables frequency control in quartz watches and electronics.

Field identification & locations

Identify by its glassy appearance, hardness, lack of cleavage, and hexagonal habit; common worldwide, especially Brazil, Arkansas, Madagascar, the Alps, and China. A simple steel scratch test should not mark it, though testing can damage the specimen.