mineral

Small white quartz fragment

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Likely massive or microcrystalline quartz; white, translucent to opaque, with a vitreous luster and no obvious cleavage. Hardness is Mohs 7, specific gravity about 2.65; the rounded shape may indicate tumbling or natural abrasion.

Identified August 14, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich igneous and hydrothermal fluids and occurs widely in veins, cavities, and sedimentary deposits. Its exact age and formation environment cannot be determined from the photograph.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, engineered stone, and electronics; attractive pieces may be collected or cut as gemstones.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly forms the sand-sized grains in sandstone and many beaches.

Field identification & locations

Identify it by its white color, glassy appearance, lack of cleavage, and ability to scratch ordinary glass; a steel knife generally will not scratch it. Common worldwide, especially in quartz veins and granitic terrains.