mineral

Tumbled chalcedony-bearing stone, possibly bloodstone or jasper

Microcrystalline quartz (SiO₂), likely chalcedony with iron-oxide inclusions; exact identification is uncertain from the photograph

AI-generated identification · may be incorrect

Opaque blue-gray to reddish-brown, fine-grained, and smoothly tumbled with a dull-to-waxy luster. Quartz hardness is about 6.5–7 Mohs; no visible cleavage, conchoidal fracture, and specific gravity near 2.6.

Identified September 4, 2026More mineral →

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At a glance

Common name: Tumbled chalcedony-bearing stone, possibly bloodstone or jasper
Scientific name: Microcrystalline quartz (SiO₂), likely chalcedony with iron-oxide inclusions; exact identification is uncertain from the photograph
Category: mineral
Identified: September 4, 2026
Method: Standard

AI Estimated Value

About $1–$10 as a common tumbled pebble; approximately $10–$30 if confirmed as attractive bloodstone or high-quality patterned jasper.

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 fills cavities and fractures, with iron oxides producing the red-brown patches. Chalcedony and jasper deposits commonly range from Cenozoic to Precambrian age depending on locality.

Uses & applications

Used for cabochons, beads, carvings, tumbled stones, and lapidary ornaments; tougher varieties are also used as minor abrasives. It has modest jewelry value unless color and pattern are unusually attractive.

Geological facts

Bloodstone is typically dark green chalcedony with vivid red hematite spots; this specimen appears more blue-gray and may instead be iron-stained jasper or another quartz-rich pebble.

Field identification & locations

Look for a very fine, non-granular texture, waxy luster, lack of cleavage, and a white streak; quartz should resist scratching by a steel knife. Common sources include India, Brazil, Madagascar, Uruguay, and the western United States.