mineral

Red jasper pebble

Jasper, microcrystalline quartz (SiO₂) colored chiefly by iron oxides

AI-generated identification · may be incorrect

Typically opaque brick-red to burgundy with brown or gray mottling, dull to waxy luster, and no visible crystals; hardness about 6.5–7 Mohs, conchoidal fracture, and specific gravity around 2.5–2.7. The rounded shape indicates natural stream or beach abrasion.

Identified August 18, 2026More mineral →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids replace or cement volcanic ash, sediments, or other rock, with hematite/goethite producing the red color; its age depends on the host formation, commonly Precambrian to younger. It is widespread in hydrothermal, volcanic, and sedimentary environments.

Uses & applications

Used as an ornamental stone for cabochons, beads, carvings, bookends, and tumbled specimens; rarely used as low-grade aggregate. Small common pieces generally have modest value.

Geological facts

The specimen’s red color and fine-grained, opaque texture are characteristic of jasper rather than translucent chalcedony. Iron-rich veins or patches commonly create brecciated or landscape-like patterns.

Field identification & locations

Identify it by its red opaque body, fine texture, hardness sufficient to scratch glass, and lack of fizz in dilute acid; common sources include India, Brazil, Madagascar, the United States, and Australia. Exact locality cannot be determined from the image.