mineral

Polished jasper pebble

Microcrystalline quartz (SiO₂), commonly iron-oxide-bearing chert/jasper

AI-generated identification · may be incorrect

Opaque, smoothly polished, cream, orange, and reddish-brown banding; dull to waxy luster; hardness about 6.5–7 Mohs; no visible cleavage; typically cryptocrystalline quartz with specific gravity near 2.6.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids replace or cement sediment, with iron oxides producing the red-orange colors; generally ancient, often Precambrian to Paleozoic, though age depends on locality.

Uses & applications

Used for cabochons, beads, ornaments, carvings, and lapidary collections; occasionally used as decorative stone. Common polished pieces are inexpensive.

Geological facts

The specimen appears human-polished and may be sold under trade names such as red jasper, scenic jasper, or banded jasper; exact variety and locality cannot be confirmed from the image alone.

Field identification & locations

Identify by its opaque appearance, fine grain, quartz-like hardness, and red coloration from hematite or goethite; common sources include India, Madagascar, Brazil, Australia, and the western United States. A streak, hardness, and close inspection for quartz grains can help distinguish it from dyed stone.