mineral

Tumbled jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly containing iron oxides and other silicates

AI-generated identification · may be incorrect

Mohs hardness 6.5–7; reddish-brown with muted green-gray patches, opaque, waxy to dull luster, and no visible cleavage. Its rounded shape and smooth surface indicate natural water wear or tumbling.

Identified September 8, 2026More mineral →

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At a glance

Common name: Tumbled jasper pebble
Scientific name: Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly containing iron oxides and other silicates
Category: mineral
Identified: September 8, 2026
Method: Standard

AI Estimated Value

Approximately $2–$15 for a small common tumbled pebble; $20–$100+ for unusually vivid patterns, larger pieces, or verified locality 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

Mohs hardness 6.5–7; reddish-brown with muted green-gray patches, opaque, waxy to dull luster, and no visible cleavage. Its rounded shape and smooth surface indicate natural water wear or tumbling.

Formation & geological history

Forms when silica-rich fluids replace or cement volcanic ash, sediments, or preexisting rock; iron impurities create the red-brown coloration. The specimen’s exact geological age and locality cannot be determined from the image.

Uses & applications

Used for ornamental objects, cabochons, beads, carvings, countertops, and decorative stone; attractive patterned pieces are collected as lapidary material.

Geological facts

Jasper is a chalcedony-related quartz rock rather than a single pure mineral. Red coloration generally reflects hematite or other iron-oxide inclusions.

Field identification & locations

Identify by its opaque appearance, fine grain, hardness, and inability to scratch with a steel knife; it should resist dilute acid. Common worldwide, especially in volcanic and sedimentary terrains.