mineral

White tumbled stone, likely quartz or milky chalcedony

Most likely microcrystalline quartz/chalcedony (SiO₂); exact identification requires hardness and specific-gravity testing

AI-generated identification · may be incorrect

Opaque white, smoothly tumbled, with a vitreous-to-waxy luster and no visible cleavage. Quartz has Mohs hardness 7 and specific gravity about 2.65; the rounded shape and uniform surface indicate human polishing.

Identified August 22, 2026More mineral →

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At a glance

Common name: White tumbled stone, likely quartz or milky chalcedony
Scientific name: Most likely microcrystalline quartz/chalcedony (SiO₂); exact identification requires hardness and specific-gravity testing
Category: mineral
Identified: August 22, 2026
Method: Standard

AI Estimated Value

Approximately $1–$5 for a common tumbled piece; perhaps $5–$20 if unusually large, translucent, or attractively shaped.

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

Quartz-rich material formed in silica-bearing veins, cavities, or sedimentary deposits; geological age cannot be determined from the photograph. It was later cut and mechanically tumbled for decoration or craft use.

Uses & applications

Commonly sold as a pocket stone, craft material, decorative aggregate, or inexpensive cabochon; not usually valuable as jewelry unless it has unusual translucency or patterning.

Geological facts

Milky quartz appears white because microscopic fluid inclusions and structural defects scatter light. Chalcedony is chemically quartz but consists of extremely fine interlocking quartz fibers.

Field identification & locations

Test with a steel file or glass: genuine quartz should scratch glass and resist a steel blade. Calcite, a possible alternative, is softer (Mohs 3) and would fizz in dilute hydrochloric acid; avoid acid unless appropriate.