mineral

White quartz-rich rock, possibly milky quartz

Likely quartz (SiO₂), though the specimen may be a quartz-rich rock with impurities

AI-generated identification · may be incorrect

Opaque white to cream with brown staining and an irregular, rough surface; quartz has Mohs hardness 7, vitreous luster, and no cleavage. Crystal structure is trigonal; exact properties of this specimen cannot be confirmed from the image.

Identified October 11, 2026More mineral →

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Physical properties

Formation & geological history

Quartz forms in many geological settings, including cooling silica-rich fluids in veins and cavities; such deposits span a wide range of geological ages.

Uses & applications

Common quartz is used in glassmaking, electronics, abrasives, and decorative objects; attractive pieces may be collected or used in jewelry.

Geological facts

Milky appearance commonly results from microscopic fluid or gas inclusions that scatter light.

Field identification & locations

Quartz is identified by its hardness, lack of cleavage, and conchoidal fracture; this small, irregular piece has no distinctive locality clues visible. Similar specimens occur worldwide in quartz veins and many rock types.