mineral

Clear quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Typically colorless to milky, with vitreous luster, translucent-to-transparent appearance, conchoidal fracture, and Mohs hardness 7; lacks cleavage and crystallizes in the trigonal system. The pieces appear rough or broken, with possible internal fractures and inclusions.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Forms from silica-rich hydrothermal fluids, igneous melts, and sedimentary veins; specimens may range from ancient Precambrian to geologically recent. The image shows natural quartz fragments, possibly lightly tumbled or broken.

Uses & applications

Used in glassmaking, ceramics, electronics, abrasives, and precision oscillators; clear attractive pieces are sold as décor or low-cost mineral specimens. High-quality transparent quartz can be cut as a gemstone.

Geological facts

Quartz is one of Earth’s most abundant minerals and is chemically identical to amethyst, citrine, and smoky quartz; color depends largely on trace elements and irradiation.

Field identification & locations

Identify by hardness, glassy luster, lack of cleavage, and quartz-like conchoidal fractures; it commonly occurs in veins, cavities, pegmatites, and river gravels worldwide. Clear quartz is common in Brazil, Madagascar, the United States, and China.