mineral

Quartz-rich rock, possibly milky quartz

Quartz (SiO₂), likely a massive quartz specimen; exact identification is uncertain from the image

AI-generated identification · may be incorrect

White to cream, 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 specimen’s irregular surface may include other minerals or weathering.

Identified October 11, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly forms when silica-rich fluids crystallize in veins or cavities, and also occurs in many igneous, metamorphic, and sedimentary rocks; its age depends on its geological setting.

Uses & applications

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

Geological facts

Quartz is one of Earth’s most abundant minerals and fractures conchoidally rather than breaking along cleavage planes.

Field identification & locations

Look for hardness sufficient to scratch glass and lack of cleavage; quartz is widespread in veins and many rock types. The image alone cannot establish whether this is massive quartz or a quartz-rich rock.