metamorphic

Tumbled red-purple quartzite or jasper

Quartz-rich quartzite/chalcedony aggregate (SiO₂), possibly iron-stained

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; rounded, opaque to slightly translucent, reddish-purple body with fine granular texture and vitreous to dull luster. Quartz-rich material lacks obvious cleavage and has a specific gravity near 2.6–2.7.

Identified August 31, 2026More metamorphic →

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Physical properties

Formation & geological history

Likely derived from quartz-rich sandstone metamorphosed and recrystallized, with iron oxides producing the red color; alternatively it may be jasper, a microcrystalline quartz variety. Exact geological age cannot be determined from the photograph.

Uses & applications

Used as a tumbled stone, ornamental pebble, cabochon, and decorative aggregate; quartzite also has construction applications. This small polished specimen has modest lapidary value.

Geological facts

The image cannot reliably distinguish quartzite from jasper or dyed material; a streak, hardness, translucency, and close inspection are needed.

Field identification & locations

Commonly found in river gravels, quartzite outcrops, and lapidary assortments worldwide. It should scratch glass, resist a steel blade, and leave little or no streak on unglazed porcelain.