mineral

Quartz-rich rock, likely milky quartz with iron staining

Mostly quartz (SiO₂); exact rock type cannot be confirmed from the photo

AI-generated identification · may be incorrect

Opaque white to cream, with rusty-brown staining and a vitreous to dull luster; quartz has Mohs hardness 7, hexagonal crystal structure, no cleavage, and conchoidal fracture. The specimen appears massive and fractured rather than showing distinct crystals.

Identified October 9, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed when silica-rich fluids filled fractures and cooled, with iron oxides later coloring the surface; age and specific setting cannot be determined visually.

Uses & applications

Common quartz is used in glassmaking, abrasives, and engineered stone; attractive pieces may be collected or used decoratively.

Geological facts

Quartz is one of Earth’s most abundant minerals and is highly resistant to weathering.

Field identification & locations

Look for hardness sufficient to scratch glass, lack of cleavage, and irregular fracture; rusty areas likely reflect iron-oxide staining. Quartz occurs worldwide in veins and many rock types.