mineral

Tumbled red jasper or carnelian

Microcrystalline quartz (SiO₂), likely iron-rich jasper/chalcedony

AI-generated identification · may be incorrect

Red-orange, opaque to slightly translucent, with a waxy to vitreous luster and curved tumbled surfaces; hardness about 6.5–7 Mohs, no visible cleavage, and conchoidal fracture. The pale cream banding suggests brecciation or quartz-rich variation.

Identified August 16, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich groundwater fills cavities or fractures, with iron oxides producing the red color; later weathering and tumbling rounded it. Formation age is locality-dependent, commonly Paleozoic to Cenozoic.

Uses & applications

Used for cabochons, beads, carvings, tumbling, and ornamental objects; jasper is also used decoratively in tiles and stonework.

Geological facts

Carnelian is typically translucent orange-red chalcedony, whereas jasper is opaque and commonly patterned; this specimen appears closer to red jasper or brecciated jasper.

Field identification & locations

Look for a glassy/waxy surface, conchoidal edges, strong resistance to scratching, and red coloration from hematite. Common sources include India, Brazil, Madagascar, Australia, and the western United States; exact identification may require translucency and specific-gravity testing.