Iron-rich jasper or hematite-bearing chert

Dark reddish-brown, opaque, earthy to dull luster with a waxy appearance; likely hardness about 6–7 Mohs, no obvious cleavage, conchoidal to irregular fracture, and specific gravity roughly 2.6–3.5 depending on iron content. The layered red-and-dark texture is consistent with iron-rich silica, though a photo cannot distinguish it confidently from ironstone or altered volcanic rock.

Usually forms by silica-rich chemical sedimentation or replacement, with iron oxides producing the red-brown color; comparable deposits range from Precambrian banded-iron formations to younger chert beds. Common localities include Australia, Brazil, India, South Africa, and the United States.

Used as lapidary material, cabochons, carvings, and decorative stone; iron-rich varieties may have minor industrial significance. Its value is primarily aesthetic and collectible.

Hematite commonly creates red streaks and magnetic response is generally weak unless magnetite is present. The specimen’s weathered surface and possible thin layering suggest a natural iron-rich siliceous rock.

Test with a steel file, streak it on unglazed porcelain, and inspect for conchoidal fracture; a red-brown streak supports hematite-rich material. Estimated value: about $5–$30 as a common rough specimen, or $30–$100+ if cut, polished, and attractively patterned.