mineral

Clear quartz (likely quartzite-like tumbled quartz)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Colorless to milky translucent, vitreous luster, irregular conchoidal fracture, no cleavage, Mohs hardness 7, and specific gravity about 2.65. The rounded form appears naturally water-worn or tumbled, with internal fractures producing the bright reflections.

Identified August 26, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich igneous, hydrothermal, and metamorphic fluids; individual crystals range from Precambrian to modern. This specimen may derive from a quartz vein or quartz-rich gravel and has been mechanically rounded or polished.

Uses & applications

Used for glass, ceramics, electronics, abrasives, countertops, and collecting; clear attractive pieces may be used decoratively or as low-grade gemstone material.

Geological facts

Quartz is one of Earth’s most abundant minerals and has piezoelectric properties. Its apparent yellow glow is likely reflected light or internal staining rather than true citrine coloration.

Field identification & locations

Identify by hardness, glassy luster, lack of cleavage, and conchoidal fracture; it should scratch ordinary glass but not be scratched by a steel knife. Common worldwide, especially in quartz veins, pegmatites, and river gravels.