mineral

Iron-stained quartz, likely quartz-rich rock fragment

Quartz (SiO₂), possibly with iron-oxide staining

AI-generated identification · may be incorrect

Small, pale yellow to honey-colored fragment with a granular, uneven surface and vitreous-to-dull luster. Quartz has Mohs hardness 7 and a trigonal crystal structure; the image does not show enough detail to assess cleavage or specific gravity.

Identified October 6, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly forms in veins and silica-rich rocks as magma cools or from mineral-rich fluids; iron oxides can impart yellow-brown color. The specimen’s age and exact formation setting cannot be determined from the image.

Uses & applications

Quartz is used in glass, electronics, abrasives, and decorative stone; attractive transparent pieces may be cut for jewelry.

Geological facts

Quartz is one of Earth’s most abundant minerals and has no true cleavage, typically breaking with a curved or irregular fracture.

Field identification & locations

Look for glassy luster, hardness sufficient to scratch glass, and irregular fracture; the yellow tint may be iron staining. Quartz occurs worldwide, especially in veins and granites.