mineral

Likely quartz-rich rock (milky quartz vein material)

Quartz, SiO₂; identification is provisional from the photo

AI-generated identification · may be incorrect

White to translucent, glassy-to-dull surface with irregular fracture; quartz has Mohs hardness 7, trigonal crystal structure, no cleavage, and specific gravity about 2.65. Brown areas may be iron-oxide staining or attached host rock.

Identified September 30, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich fluids in fractures and veins, or forms in igneous and metamorphic settings. The specimen’s age and precise formation environment cannot be determined from the image.

Uses & applications

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

Geological facts

Quartz is one of Earth’s most abundant minerals and often forms veins cutting through older rocks.

Field identification & locations

Look for hardness (scratches glass), lack of cleavage, and conchoidal fracture; compare against calcite, which is softer and fizzes in dilute acid. Common worldwide in veins and pegmatites; a fresh close-up or scratch test would improve identification.