mineral

Likely rough quartz crystal fragment

Quartz (SiO₂), possibly iron-stained milky quartz

AI-generated identification · may be incorrect

Translucent to opaque brownish-white with a glassy-to-dull luster and irregular fracture; quartz has Mohs hardness 7, trigonal crystal structure, no cleavage, and specific gravity about 2.65. The photo alone does not show enough detail for a certain identification.

Identified October 9, 2026More mineral →

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Physical properties

Formation & geological history

Quartz forms when silica-rich fluids crystallize in veins and cavities, or during igneous and metamorphic processes; it occurs in rocks of many geological ages.

Uses & applications

Common quartz is used in glass, electronics, abrasives, and decorative objects; this small rough fragment has modest collecting value.

Geological facts

Quartz is one of Earth’s most abundant minerals and can be colored by inclusions or trace impurities, including iron compounds.

Field identification & locations

Look for glassy areas, hardness sufficient to scratch ordinary glass, and lack of cleavage; common worldwide in veins, pegmatites, and many host rocks. A close-up or hardness test would help confirm the identification.