mineral

Quartz

Silicon Dioxide (SiO2)

Hardness of 7 on the Mohs scale, varies in color (often clear, white, or pinkish in rose quartz), vitreous luster, hexagonal crystal system, conchoidal fracture, specific gravity of 2.65.

Identified August 4, 2026More mineral →

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Physical properties

Hardness of 7 on the Mohs scale, varies in color (often clear, white, or pinkish in rose quartz), vitreous luster, hexagonal crystal system, conchoidal fracture, specific gravity of 2.65.

Formation & geological history

Forms in a wide variety of geological environments, including igneous, metamorphic, and sedimentary rocks. Often crystallizes from silica-rich hydrothermal veins and pegmatites.

Uses & applications

Used in electronics, watches, glassmaking, abrasive materials, and as a gemstone or decorative mineral in jewelry and collecting.

Geological facts

Quartz is one of the most abundant minerals found in the Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electrical charge under mechanical stress.

Field identification & locations

Identified by its high hardness (scratches glass), lack of cleavage, and characteristic conchoidal fracture. Found worldwide in almost all types of rock formations.