mineral

Iron-stained quartz (probable quartz vein fragment)

Quartz, SiO₂, with iron-oxide staining

AI-generated identification · may be incorrect

White to translucent gray quartz with reddish-brown hematite/goethite staining; vitreous luster, irregular fracture, no obvious cleavage, Mohs hardness 7, specific gravity about 2.65. The image is low-resolution, so identification is provisional.

Identified August 22, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed when silica-rich fluids filled fractures in host rock, later acquiring iron staining through weathering; quartz veins range from ancient Precambrian to geologically recent. It may also be a small weathered fragment of quartz-bearing rock.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and construction aggregate; attractive pieces are collected but usually have little gem value.

Geological facts

Quartz is one of Earth’s most abundant minerals and is chemically resistant, often surviving after softer surrounding minerals weather away.

Field identification & locations

Check for glassy luster, sharp edges, and ability to scratch ordinary glass; iron staining is not diagnostic. Common worldwide, especially in quartz veins and hydrothermal districts.