mineral

Tumbled quartz-rich stone, likely orange chalcedony or iron-stained quartzite

Microcrystalline quartz (SiO₂), possibly quartzite; orange coloration from iron oxides

AI-generated identification · may be incorrect

Typically Mohs hardness 6.5–7, opaque to slightly translucent, orange-tan color, vitreous to waxy luster, and no visible cleavage; compact and smoothly water-worn or tumbled.

Identified September 4, 2026More mineral →

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At a glance

Common name: Tumbled quartz-rich stone, likely orange chalcedony or iron-stained quartzite
Scientific name: Microcrystalline quartz (SiO₂), possibly quartzite; orange coloration from iron oxides
Category: mineral
Identified: September 4, 2026
Method: Standard

AI Estimated Value

About $1–$10 for a small common tumbled stone; $10–$50 if it proves to be attractive, translucent chalcedony or a collectible locality specimen.

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

Typically Mohs hardness 6.5–7, opaque to slightly translucent, orange-tan color, vitreous to waxy luster, and no visible cleavage; compact and smoothly water-worn or tumbled.

Formation & geological history

Quartz-rich material formed through silica precipitation or metamorphism of sandstone, with later iron-oxide staining. Its exact geological age and locality cannot be determined from the photograph.

Uses & applications

Used as a lapidary material for cabochons, beads, carvings, and decorative stones; low-grade pieces are common landscaping or craft material.

Geological facts

The orange color commonly reflects hematite or limonite inclusions rather than the quartz itself. A steel file or knife should not readily scratch genuine quartz-rich material.

Field identification & locations

Look for hardness, a glassy/waxy surface, conchoidal fracture, and resistance to scratching; an unglazed ceramic streak test may help, though surface coatings can interfere. Common worldwide in quartz veins, river gravels, and altered sandstones.