mineral

Milky quartz with iron staining

Quartz (SiO₂)

AI-generated identification · may be incorrect

White to translucent gray, with rusty-brown iron-oxide staining; vitreous luster and irregular fracture. Quartz has Mohs hardness 7, a trigonal crystal structure, and no cleavage; the specimen’s small size and rough surface limit precise identification from the image.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed as quartz in a hydrothermal vein or silica-rich fracture, then stained by iron oxides during weathering. Quartz occurs in rocks of many geological ages.

Uses & applications

Commonly used for ornamental pieces, specimens, and silica-based industrial materials; this rough piece appears primarily of collecting interest.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly forms in veins and cavities.

Field identification & locations

Look for hardness near 7, glassy luster, and lack of cleavage; it occurs worldwide in igneous, metamorphic, and sedimentary settings. The pictured piece is consistent with iron-stained milky quartz, though a photo cannot confirm it.