gemstone

Polished brecciated jasper bracelet

Jasper, microcrystalline quartz (SiO₂), commonly with hematite and iron-oxide inclusions

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; opaque reddish-brown, burgundy, and dark gray-black beads with mottled or brecciated patterns; vitreous to waxy luster, cryptocrystalline structure, and no visible cleavage. The beads are drilled, rounded, and polished.

Identified September 14, 2026More gemstone →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids cement or replace volcanic and sedimentary materials, with iron oxides producing the red coloration; formation ages vary widely, commonly Paleozoic to Cenozoic depending on locality. This is a human-shaped and polished specimen.

Uses & applications

Used for ornamental beads, bracelets, cabochons, carvings, and decorative objects; value is primarily aesthetic rather than industrial.

Geological facts

Jasper is a variety of chalcedony or dense microcrystalline quartz, though commercial names often include mixed rock materials. Iron-rich brecciation creates the characteristic red-and-black pattern.

Field identification & locations

Identify by its opaque appearance, fine-grained texture, reddish iron staining, and inability to scratch with a steel knife easily; common sources include India, Madagascar, Brazil, and the United States.