metamorphic

Tumbled pink quartzite (probable)

Quartzite; predominantly crystalline SiO₂, possibly iron-stained with minor mica or feldspar

AI-generated identification · may be incorrect

Hardness about 7 Mohs; salmon-pink to tan, opaque, waxy to subvitreous luster, massive granular texture, and no obvious cleavage. The rounded surface is polished/tumbled, with a darker mineral vein or inclusion crossing it.

Identified September 21, 2026More metamorphic →

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Physical properties

Formation & geological history

Formed when quartz-rich sandstone was recrystallized under heat and pressure, commonly during mountain-building; age depends on its source and cannot be determined visually. Iron oxides likely produced the warm coloration.

Uses & applications

Used as an ornamental stone, landscaping material, aggregate, and occasionally cabochons or carvings. This specimen is mainly a decorative or lapidary piece.

Geological facts

Quartzite is typically harder and more resistant to weathering than its sandstone precursor. A steel file should not scratch it; quartz-rich surfaces may scratch glass.

Field identification & locations

Common in metamorphic mountain belts worldwide, including Brazil, India, the United States, and Scandinavia. Confirm with a hardness test and acid test: it should resist scratching and show no reaction to dilute hydrochloric acid.