mineral

Quartz with iron-oxide staining

Quartz (SiO₂), with orange-brown iron-oxide/hydroxide coatings, likely limonite or goethite

AI-generated identification · may be incorrect

Hardness 7; white to translucent quartz with a vitreous luster and irregular fracture, alongside rusty orange-brown coatings. Quartz has a trigonal crystal structure, though distinct crystal faces are not visible here.

Identified September 22, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly forms when silica-rich fluids fill fractures and crystallize; iron-bearing fluids can later stain or coat it. The specimen’s specific age and geological setting cannot be determined from the image.

Uses & applications

Quartz is used in glass, electronics, abrasives, and decorative objects; attractive iron-stained pieces are mainly collected or used as décor.

Geological facts

The orange-brown color is likely from iron oxides rather than from the quartz itself.

Field identification & locations

Look for glassy or translucent areas, hardness sufficient to scratch ordinary glass, and no cleavage; quartz commonly occurs in veins and mineralized fractures worldwide. The image does not establish a precise locality or specimen grade.