sedimentary

Polished red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

AI-generated identification · may be incorrect

Typically 6.5–7 Mohs; opaque brick-red to brown with black or gray patterns, vitreous to waxy luster, cryptocrystalline quartz structure, and no visible cleavage. The specimens shown are tumbled/polished and may include brecciated or iron-rich material.

Identified September 8, 2026More sedimentary →

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At a glance

Common name: Polished red jasper
Scientific name: Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides
Category: sedimentary
Identified: September 8, 2026
Method: Standard

AI Estimated Value

About $5–$25 for small common polished pieces; $25–$100+ for unusually attractive patterns, larger specimens, or documented collectible material.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Forms when silica-rich groundwater cements fine sediment, volcanic ash, or breccia; red color develops from hematite/goethite. Deposits occur in many ages, commonly in Precambrian to younger volcanic-sedimentary sequences.

Uses & applications

Used for cabochons, beads, carvings, decorative objects, and lapidary specimens; occasionally as an ornamental stone. Common polished pieces generally have modest market value.

Geological facts

Jasper is a variety of chalcedony distinguished by its opacity from abundant impurities. Patterned varieties may be sold as brecciated jasper, ocean jasper, or poppy jasper depending on locality and appearance.

Field identification & locations

Identify by its opaque red body color, iron-oxide patterns, glassy polish, and ability to scratch ordinary glass; it lacks the translucency typical of agate. Common sources include India, Madagascar, Brazil, Australia, and the western United States.