mineral

Quartz-rich rock, possibly milky quartz with iron staining

Predominantly quartz (SiO₂); exact rock type cannot be confirmed visually

AI-generated identification · may be incorrect

Gray-white, massive and rough, with rusty yellow-brown iron-oxide staining and a vitreous to dull luster. Quartz hardness is 7 Mohs, with no cleavage and uneven to conchoidal fracture; the specimen appears polycrystalline.

Identified October 1, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed as a quartz vein or quartz-rich body from silica-bearing fluids in fractures; iron staining developed through later weathering. Its age cannot be determined from the image.

Uses & applications

Quartz is used in glassmaking, abrasives, and electronics; attractive pieces may be collected or used decoratively.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly occurs in veins cutting many rock types.

Field identification & locations

Look for hardness sufficient to scratch glass, lack of cleavage, and a pale color; rusty patches often indicate iron oxides. Quartz veins are widespread in many regions, but testing or close examination is needed to identify associated minerals.