mineral

Red jasper (likely polished/tumbled)

Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides

AI-generated identification · may be incorrect

Opaque brick-red to brown, smooth tumbled surface, dull to waxy luster, no visible cleavage; Mohs hardness about 6.5–7; specific gravity about 2.6. Pale cream markings may be quartz or chalcedony inclusions.

Identified August 10, 2026More mineral →

Explore Red jasper (likely polished/tumbled) 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 fluids fill cavities or replace volcanic and sedimentary rocks, with iron producing the red color. Jasper deposits range from Precambrian to younger ages; the exact age cannot be determined visually.

Uses & applications

Used for cabochons, beads, carvings, ornamental objects, and inexpensive tumbled stones; durable enough for some decorative surfaces.

Geological facts

Jasper is an opaque variety of chalcedony/microcrystalline quartz rather than a single mineral species. The rounded shape and uniform polish indicate human tumbling, not natural weathering alone.

Field identification & locations

Identify by its opaque red color, very fine texture, hardness, and lack of cleavage; it should resist scratching by a steel blade, though this test can damage it. The Budapest-area regional geology is largely sedimentary, so imported or transported jasper is plausible; local origin is not certain.