sedimentary

Red jasper (iron-rich chert), possibly brecciated

Jasper: microcrystalline quartz (SiO₂) colored mainly by hematite/goethite; likely chert/jasper with iron-oxide veining

AI-generated identification · may be incorrect

Typically Mohs hardness 6.5–7, opaque, red-orange to brown with darker brecciated zones, and a dull to waxy or glassy luster. Quartz has a cryptocrystalline structure with no visible cleavage; specific gravity is about 2.6.

Identified September 5, 2026More sedimentary →

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At a glance

Common name: Red jasper (iron-rich chert), possibly brecciated
Scientific name: Jasper: microcrystalline quartz (SiO₂) colored mainly by hematite/goethite; likely chert/jasper with iron-oxide veining
Category: sedimentary
Identified: September 5, 2026
Method: Standard

AI Estimated Value

About $2–$15 for a common hand specimen; $20–$100 or more for unusually patterned, polished, or lapidary-quality 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 sediments or volcanic fluids become silicified, with iron oxides producing the red coloration; brecciation may reflect later fracturing and cementation. Ages vary widely, commonly Precambrian to younger.

Uses & applications

Used as lapidary rough, cabochons, carvings, beads, and decorative stone; attractive pieces are collectible but generally inexpensive.

Geological facts

Jasper is a variety of opaque, impure chert rather than a single mineral. The specimen’s strong orange-red color and dark angular banding are characteristic of iron-rich jasper.

Field identification & locations

Identify by its opaque red color, very fine texture, lack of cleavage, and inability to scratch it with a steel knife easily; a streak test is usually pale red-brown. Common sources include India, Brazil, Madagascar, Australia, South Africa, and the western United States.