mineral

Tumbled brown jasper (likely brecciated or scenic jasper)

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

AI-generated identification · may be incorrect

Opaque dark brown to reddish-brown with golden-yellow iron staining and subtle banding; vitreous to waxy luster, no visible cleavage, conchoidal fracture, and Mohs hardness about 6.5–7. Typically specific gravity is ~2.6.

Identified September 12, 2026More mineral →

Explore Tumbled brown jasper (likely brecciated or scenic jasper) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Forms when silica-rich groundwater fills fractures or replaces sediment, while iron oxides create the brown, red, and yellow patterns. Jasper deposits commonly formed during ancient volcanic and sedimentary activity, often from the Precambrian through Mesozoic eras.

Uses & applications

Used for ornamental carvings, cabochons, beads, polished stones, and lapidary work; its durability makes it suitable for decorative objects rather than structural construction.

Geological facts

Jasper is an opaque variety of chalcedony, unlike translucent agate. The specimen appears polished or tumbled, so its rounded shape and glossy surface are human-processed.

Field identification & locations

Identify it by its opaque earthy colors, fine-grained texture, hardness, and lack of cleavage; a steel file should have difficulty scratching it. Common sources include India, Madagascar, Brazil, Australia, and the western United States.