mineral

Pink botryoidal chalcedony (likely quartz-rich jasper/agate)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; opaque cream, pink, red, and orange coloration; waxy to dull luster; botryoidal and locally banded texture; no obvious cleavage; specific gravity about 2.6.

Identified August 29, 2026More mineral →

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Physical properties

Hardness about 6.5–7 Mohs; opaque cream, pink, red, and orange coloration; waxy to dull luster; botryoidal and locally banded texture; no obvious cleavage; specific gravity about 2.6.

Formation & geological history

Silica-rich groundwater deposited chalcedony in cavities and fractures, producing rounded botryoidal growths; iron oxides create the warm red-pink colors. The specimen’s precise geological age and locality cannot be determined from the image.

Uses & applications

Used as a lapidary stone for cabochons, carvings, polished pieces, and inexpensive jewelry; attractive collector specimens have modest decorative value.

Geological facts

Its rounded “grape-like” surface is characteristic of botryoidal chalcedony, while the mottled iron staining may justify labels such as jasper or plume agate depending on locality and internal structure.

Field identification & locations

Commonly found in volcanic cavities and silica-rich veins, including deposits in Brazil, Mexico, Madagascar, Indonesia, and the western United States. It should resist scratching by a steel knife and leave a white streak; acid does not react.