mineral

Iron-stained quartz vein fragment

Quartz, SiO₂, with iron-oxide/hydroxide staining (likely goethite or limonite)

AI-generated identification · may be incorrect

Mostly opaque to translucent, with white-gray quartz and ochre-brown patches; vitreous luster on fresh surfaces, Mohs hardness 7, hexagonal crystal structure, and no cleavage. The rough, irregular fracture and rusty staining are visible, but the specimen cannot be identified more precisely from the image alone.

Identified September 25, 2026More mineral →

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Physical properties

Formation & geological history

Likely quartz deposited from silica-rich fluids in a fracture, then stained by iron-bearing weathering products. Quartz veins form in many geological eras and settings; the image does not establish a specific age or locality.

Uses & applications

Common quartz is used in glass, ceramics, and electronics; iron-stained fragments are mainly collected as specimens or used decoratively.

Geological facts

Quartz is one of Earth’s most abundant minerals; iron oxides can color it yellow, orange, or brown without changing its composition.

Field identification & locations

Look for hardness near 7, glassy fracture surfaces, and iron-rich coatings; common in veins and weathered outcrops worldwide. A firm identification would benefit from locality and simple hardness testing.