metamorphic

Tumbled quartz-rich stone, possibly quartzite

Quartz (SiO₂), likely quartzite with iron-oxide staining

AI-generated identification · may be incorrect

Hardness about 7 Mohs; cream to honey-yellow, translucent in thin areas, with vitreous to waxy luster and no obvious cleavage. The rounded, smooth surface indicates natural or deliberate tumbling; reddish-brown patches are likely limonite/goethite.

Identified September 15, 2026More metamorphic →

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Physical properties

Formation & geological history

If quartzite, it formed when quartz sandstone recrystallized under metamorphic heat and pressure, commonly during Precambrian–Paleozoic mountain-building; exact age cannot be determined visually. It may also be massive vein quartz or chalcedony-bearing material.

Uses & applications

Used as an ornamental stone, lapidary material, aggregate, and occasionally in countertops or landscaping; attractive translucent pieces are collectible but not usually gem-grade.

Geological facts

Quartz-rich rocks commonly develop iron staining from groundwater oxidation. The specimen’s rounded shape and surface wear are consistent with a river cobble or tumbled lapidary stone.

Field identification & locations

A glassy luster, very high hardness, white-to-honey color, and inability to scratch it with a steel knife support quartz; vinegar will not fizz. Common sources include quartz veins, quartzite terrains, and stream gravels worldwide.