mineral

Quartz-rich rock, likely milky quartz vein material

Quartz (SiO₂), possibly with iron staining and minor host-rock minerals

AI-generated identification · may be incorrect

White to tan, opaque and rough, with a vitreous-to-dull luster; quartz has Mohs hardness 7, trigonal crystal structure, no cleavage, and specific gravity about 2.65. The photo does not show enough detail to determine whether this is a single quartz mass or quartz-rich rock.

Identified October 11, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich fluids in fractures and veins, or occurs in igneous and metamorphic rocks; its age depends on the host geology and cannot be determined from the image.

Uses & applications

Quartz is used in glass, ceramics, electronics, and jewelry; this rough piece is mainly suitable for collecting or as a lapidary material if clean enough.

Geological facts

Quartz is one of Earth’s most abundant minerals and resists weathering, making it common in soils and sediments.

Field identification & locations

Look for hardness sufficient to scratch ordinary glass and lack of cleavage; milky quartz often occurs in veins worldwide. The tan areas may be staining or attached host rock.