mineral

Quartz-rich rock, possibly milky quartz or quartzite

Quartz (SiO₂), potentially quartzite if the grains are fused

AI-generated identification · may be incorrect

Hardness about 7 Mohs; translucent white to gray with glassy to waxy luster, irregular fractures, and no obvious cleavage. The rounded, glossy surface suggests a naturally weathered or tumbled specimen; dark inclusions may be iron oxides or other minerals.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich fluids and igneous melts; quartzite forms when sandstone is metamorphosed. The specimen’s exact age and formation setting cannot be determined from the photograph.

Uses & applications

Used in glass, ceramics, electronics, abrasives, countertops, and construction; attractive pieces may be sold as decorative or lapidary material.

Geological facts

Quartz is one of Earth’s most abundant minerals and has a characteristic conchoidal fracture. Milky appearance commonly results from microscopic fluid inclusions or fractures.

Field identification & locations

Look for glassy luster, lack of cleavage, white translucency, and resistance to scratching with a steel knife; quartz should scratch glass. Common worldwide, especially in hydrothermal veins, pegmatites, and quartz-rich metamorphic rocks.