mineral

Polished brecciated jasper

Jasper, microcrystalline quartz (SiO₂), likely brecciated and iron-oxide stained

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; opaque burgundy-red with a cream vein, vitreous to waxy luster, and no visible cleavage. Its rounded, polished form obscures crystal texture; specific gravity is approximately 2.6.

Identified August 26, 2026More mineral →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids replace or cement sediments and volcanic material, with iron oxides producing red coloration; the pale band may be quartz or calcite. It can form in many geological ages and settings, commonly associated with volcanic terrains.

Uses & applications

Used for cabochons, beads, carvings, worry stones, and decorative objects; as a small polished piece, it has little industrial or jewelry value.

Geological facts

The specimen’s contrasting band and red matrix are typical of brecciated or vein-bearing jasper, though exact variety identification requires close examination or testing.

Field identification & locations

Identify it by its opaque red-brown body, cream vein, very fine grain, and resistance to scratching by steel; common sources include India, Madagascar, Brazil, Mexico, and the western United States.