mineral

Quartz (Clear Quartz Point)

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Mohs hardness of 7, vitreous (glass-like) luster, hexagonal crystal system, trigonal crystal class, conchoidal fracture, colorless to milky white transparency with internal veil inclusions, specific gravity ~2.65.

Identified July 27, 2026More mineral →

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Physical properties

Formation & geological history

Formed in igneous pegmatites, hydrothermal veins, and metamorphic rocks where silica-rich fluids cool and crystallize under specific pressure and temperature conditions over geological timescales.

Uses & applications

Widely used in electronics (piezoelectric applications), optics, glassmaking, abrasive industries, gemstone carving, lapidary arts, and highly favored as mineral specimens for collectors.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Pure clear quartz is historically known as 'rock crystal', which ancient Greeks believed was permanently frozen ice ('krystallos').

Field identification & locations

Identified by its distinctive six-sided prism shape ending in hexagonal pyramids, high hardness (scratches glass readily), and glassy luster. Found globally in places like Arkansas (USA), Brazil, and Madagascar.