mineral

Red jasper (likely polished or dyed)

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

AI-generated identification · may be incorrect

Opaque, vivid red, glassy-to-waxy polish, with no visible crystals or cleavage; Mohs hardness about 6.5–7 and specific gravity 2.5–2.7. The unusually uniform color and surface gloss may indicate dyeing or lacquer.

Identified August 18, 2026More mineral →

Explore Red jasper (likely polished or dyed) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Jasper forms when silica-rich fluids replace or cement volcanic or sedimentary material, with iron oxides producing red coloration; deposits range from Precambrian to younger ages. It occurs in hydrothermal veins, volcanic rocks, and chert beds.

Uses & applications

Used for cabochons, beads, carvings, tumbling, ornaments, and decorative stone; occasionally used as minor architectural or lapidary material.

Geological facts

Jasper is a variety of chalcedony/microcrystalline quartz, though many commercial red jaspers contain hematite, clay, or other inclusions. A uniform scarlet surface is less diagnostic than natural patterns and inclusions.

Field identification & locations

Common sources include India, Brazil, Madagascar, South Africa, Australia, and the western United States. Check for natural mottling, quartz-like hardness, and dye concentration in cracks; glass or plastic imitations scratch much more easily.