mineral

Polished red-and-cream jasper

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

AI-generated identification · may be incorrect

Opaque, fine-grained chalcedony/quartz with cream, brick-red, and brown iron-oxide patterns; Mohs hardness about 6.5–7, vitreous to waxy luster, no visible cleavage, and typical specific gravity near 2.6. The rounded shape indicates tumbling or natural abrasion.

Identified September 21, 2026More mineral →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids cement or replace volcanic ash, sediment, or other rock, with iron oxides producing the red coloration. It commonly forms in volcanic and hydrothermal environments, generally from Paleozoic to Cenozoic deposits depending on locality.

Uses & applications

Used for cabochons, beads, carvings, bookends, and decorative objects; polished pieces are popular inexpensive gemstones and collector specimens.

Geological facts

The image appears consistent with brecciated or orbicular-style jasper, though exact variety and locality cannot be confirmed visually. Red coloration usually reflects hematite or related iron minerals.

Field identification & locations

Identify it by its opaque appearance, red iron-rich patterning, glass-scratching hardness, and lack of cleavage; common sources include India, Madagascar, Brazil, Australia, and the western United States.