mineral

Tumbled pink chalcedony (likely pink agate/jasper)

Microcrystalline quartz, SiO₂, with iron-oxide coloring

AI-generated identification · may be incorrect

Polished, translucent-to-opaque salmon-pink material with rusty-red zoning; vitreous to waxy luster and no visible cleavage. Hardness about 6.5–7 Mohs; typically cryptocrystalline and specific gravity near 2.6.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich groundwater fills cavities or fractures, later incorporating iron oxides that produce pink to red colors; commonly associated with volcanic rocks, generally formed from Paleozoic to Cenozoic deposits.

Uses & applications

Used for inexpensive cabochons, beads, carvings, tumbling, and ornamental objects; valued mainly as a decorative gemstone.

Geological facts

The exact identification could be pink chalcedony, pink agate, or jasper because these varieties grade into one another; translucency favors chalcedony or agate, while opacity favors jasper.

Field identification & locations

Commonly found in volcanic terrains and silica-rich nodules worldwide, including Brazil, Uruguay, Madagascar, India, and the western United States. Glassy conchoidal fracture, hardness, and lack of cleavage help distinguish it from calcite or dyed softer stones.