mineral

Red jasper-like pebble

Microcrystalline quartz (chalcedony), typically colored by iron oxides; exact identification is uncertain from the image

AI-generated identification · may be incorrect

Opaque reddish-brown, dull to slightly waxy luster, very fine-grained with no visible crystals or cleavage; Mohs hardness about 6.5–7 and specific gravity roughly 2.6.

Identified August 11, 2026More mineral →

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Physical properties

Opaque reddish-brown, dull to slightly waxy luster, very fine-grained with no visible crystals or cleavage; Mohs hardness about 6.5–7 and specific gravity roughly 2.6.

Formation & geological history

Forms when silica-rich fluids fill fractures or cavities and crystallize as chalcedony, with iron oxides producing the red-brown color; age depends on its host rock and may range from young to Precambrian.

Uses & applications

Used as ornamental stone, cabochons, beads, carvings, and small tumbled specimens; common pieces have limited commercial value.

Geological facts

Jasper is an opaque variety of chalcedony rather than a single precisely defined mineral species; similar red pebbles can also be iron-stained volcanic rock or quartzite.

Field identification & locations

Look for a dense, opaque pebble that scratches glass and does not show cleavage; a streak test, hardness test, and examination of freshly broken surfaces would help distinguish jasper from red volcanic rock.