mineral

Quartz-rich rock fragment

Likely milky quartz (SiO₂), possibly a pale quartzite fragment

AI-generated identification · may be incorrect

White to gray, granular-to-glassy luster, irregular fracture, and no obvious cleavage; quartz hardness is Mohs 7 and specific gravity about 2.65. The small specimen appears rough and naturally weathered, though its exact texture is difficult to confirm from one image.

Identified August 19, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich igneous fluids and melts; quartzite forms when sandstone is metamorphosed. Quartz is widespread from Precambrian to modern geological settings, while this fragment’s age and locality cannot be determined visually.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and engineered stone; attractive pieces may be sold as mineral specimens. Quartzite is used for construction aggregate, dimension stone, and countertops.

Geological facts

Quartz is one of Earth’s most abundant minerals and is a major component of granite, sandstone, and many metamorphic rocks.

Field identification & locations

Identify it by its white color, hardness, lack of cleavage, and ability to scratch ordinary glass; a steel nail usually will not scratch it. Common worldwide, especially in quartz veins, granites, sandstones, and metamorphic terrains.