mineral

Likely quartz-rich rock (possibly milky quartz or quartz-bearing vein rock)

Quartz, SiO₂; exact identification is uncertain from the image

AI-generated identification · may be incorrect

Creamy white to tan, translucent patches with a vitreous to dull luster and irregular fracture; quartz has Mohs hardness 7, trigonal crystal structure, and no cleavage. The specimen appears mottled and possibly weathered or coated.

Identified October 9, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich hydrothermal fluids in fractures and veins, or occurs in igneous and metamorphic rocks. Its age and formation setting cannot be determined from the photograph.

Uses & applications

Quartz is used in glassmaking, electronics, abrasives, and decorative stone; attractive pieces may be collected or used in crafts.

Geological facts

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

Field identification & locations

Look for glassy luster, hardness sufficient to scratch ordinary glass, and lack of cleavage; confirm with a fresh surface and hardness test. Quartz occurs worldwide in veins and many rock types.