mineral

Jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide staining

AI-generated identification · may be incorrect

Opaque, irregularly fractured specimen with red-brown, mustard-yellow, cream, and dark gray zones; typically Mohs hardness 6.5–7, vitreous to dull/waxy luster, no cleavage, and conchoidal fracture. The color primarily reflects hematite/goethite impurities.

Identified September 8, 2026More mineral →

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Physical properties

Formation & geological history

Jasper forms when silica-rich groundwater replaces or fills volcanic, sedimentary, or hydrothermal rock, commonly with iron-oxide mineralization; exact age and locality cannot be determined from the image. Brecciation may reflect fracturing followed by silica cementation.

Uses & applications

Used as ornamental stone, cabochons, beads, carvings, polished specimens, and lapidary material; generally unsuitable for major construction because it occurs in small decorative pieces.

Geological facts

The specimen’s multicolored, opaque pattern is characteristic of jasper rather than transparent agate. Exact identification may require a fresh surface, hardness test, and locality information.

Field identification & locations

Identify by its opaque appearance, red/yellow iron staining, hardness, and conchoidal fracture; common sources include India, Madagascar, Brazil, Mexico, Australia, and the western United States.