mineral

Tumbled iron-rich stone, likely hematite-bearing jasper

Jasper (microcrystalline quartz, SiO₂) with iron oxides, chiefly hematite/goethite

AI-generated identification · may be incorrect

Opaque, rounded and polished; mottled brown, red, black, and metallic rusty patches with vitreous-to-waxy luster. Quartz hardness is about Mohs 6.5–7; hematite-rich areas may show a reddish-brown streak and higher density.

Identified August 14, 2026More mineral →

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At a glance

Common name: Tumbled iron-rich stone, likely hematite-bearing jasper
Scientific name: Jasper (microcrystalline quartz, SiO₂) with iron oxides, chiefly hematite/goethite
Category: mineral
Identified: August 14, 2026
Method: Standard

AI Estimated Value

Typically $5–$30 for a common tumbled specimen; unusually patterned, dense, or well-polished pieces may sell for $30–$75.

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 fluids cement or replace sediments and volcanic material, while iron oxidation creates the red-brown coloration; exact age cannot be determined from the image. Commonly associated with weathered iron-bearing rocks and hydrothermal settings.

Uses & applications

Used as decorative stone, cabochons, beads, carvings, and lapidary material; jasper is also collected for its patterns. It has little conventional construction value in small polished pieces.

Geological facts

The smooth spherical shape is human-made by tumbling, not a natural crystal form. A strong red-brown streak supports hematite or iron-oxide content, whereas jasper itself generally leaves little streak.

Field identification & locations

Look for opaque, fine-grained texture, conchoidal fracture, and varied iron staining; test streak on unglazed porcelain and hardness against glass. Common sources include India, Brazil, Madagascar, Australia, and the western United States.