metamorphic
Tumbled pink quartzite or rose quartz
Quartz-rich quartzite; chiefly silicon dioxide (SiO₂), possibly with iron-bearing inclusions
AI-generated identification · may be incorrectSmall, smoothly rounded specimen with pink, cream, and gray coloration and a subdued waxy-to-glassy luster. Quartz has Mohs hardness 7, no cleavage, conchoidal fracture, trigonal crystal structure, and specific gravity about 2.65; exact identification is limited by the image.
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Physical properties
Small, smoothly rounded specimen with pink, cream, and gray coloration and a subdued waxy-to-glassy luster. Quartz has Mohs hardness 7, no cleavage, conchoidal fracture, trigonal crystal structure, and specific gravity about 2.65; exact identification is limited by the image.
Formation & geological history
If quartzite, it formed when quartz-rich sandstone recrystallized under heat and pressure, commonly during Precambrian–Paleozoic mountain-building; if rose quartz, it crystallized from silica-rich igneous or hydrothermal fluids. Its smooth surface indicates natural abrasion or tumbling.
Uses & applications
Used decoratively, in lapidary work, jewelry, and as a collector specimen; quartzite is also used as aggregate and dimension stone. This small piece has modest commercial value.
Geological facts
The pink color commonly comes from microscopic iron- or titanium-bearing inclusions rather than impurities visible to the eye. A steel file should not scratch quartz-rich material.
Field identification & locations
Common in quartz-rich gravels, streambeds, and glacial deposits worldwide; major sources include Brazil, Madagascar, India, and the United States. Confirm with a hardness test and inspect for granular quartz texture or translucent pink quartz.
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