mineral

Milky quartz with iron-oxide staining

Quartz (SiO₂), likely massive to crystalline vein quartz

AI-generated identification · may be incorrect

White to translucent, vitreous luster, with rusty brown iron-oxide coatings and inclusions. Mohs hardness 7; trigonal crystal system, no cleavage, uneven to conchoidal fracture; specific gravity about 2.65.

Identified October 13, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly precipitates from silica-rich fluids in fractures and veins, then may acquire iron-oxide staining during weathering. The image alone cannot establish its geological age or precise formation setting.

Uses & applications

Quartz is used in glassmaking, electronics, abrasives, and decorative stone; attractive pieces may be kept as inexpensive specimens.

Geological facts

The rusty material is likely iron oxides such as goethite or hematite, rather than part of the quartz crystal structure.

Field identification & locations

Identify by its glassy appearance, hardness (it scratches ordinary glass), and lack of cleavage; common in veins and weathered outcrops worldwide. The specimen appears to be quartz attached to rusty matrix.