metamorphic

Tumbled brecciated jasper

Microcrystalline quartz (SiO₂), commonly with hematite/goethite and other iron-oxide inclusions

AI-generated identification · may be incorrect

Typically Mohs 6.5–7, opaque, with red-brown, cream, gray, and black angular patches; vitreous to waxy luster and no visible cleavage. The rounded surface indicates tumbling and polishing rather than natural form.

Identified August 19, 2026More metamorphic →

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Physical properties

Formation & geological history

Formed when silica-rich rock or sediment was fractured and recemented by quartz and iron-bearing fluids; many jasper varieties formed in volcanic or hydrothermal environments, commonly during the Precambrian to younger geologic periods.

Uses & applications

Used as an inexpensive ornamental stone, cabochon, bead, carving material, and collectible tumbled stone; occasionally used for decorative tile and mosaics.

Geological facts

The brecciated pattern results from fragments cemented together, while red coloration generally comes from hematite or related iron oxides.

Field identification & locations

Identify by its opaque multicolor breccia pattern, glassy/waxy polish, and inability to scratch quartz; common sources include Oregon, Utah, Arizona, Madagascar, India, and Brazil. Exact variety cannot be confirmed from the image alone.