metamorphic

Tumbled light-colored stone, possibly quartzite or limestone

Indeterminate; likely quartzite (mostly SiO₂) or calcitic limestone (CaCO₃)

AI-generated identification · may be incorrect

Small, rounded and polished, pale cream-gray, with a matte to weakly waxy luster and no visible crystals or layering. Hardness cannot be determined reliably from the image: quartzite is about 7 Mohs, while limestone is about 3.

Identified August 11, 2026More metamorphic →

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At a glance

Common name: Tumbled light-colored stone, possibly quartzite or limestone
Scientific name: Indeterminate; likely quartzite (mostly SiO₂) or calcitic limestone (CaCO₃)
Category: metamorphic
Identified: August 11, 2026
Method: Standard

AI Estimated Value

About $1-$5 as a small common tumbled pebble; higher value is unlikely without distinctive texture, provenance, or confirmed gem 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

Formation & geological history

Likely a naturally rounded pebble or human-tumbled specimen; quartzite forms by metamorphism of sandstone, whereas limestone forms by carbonate sediment accumulation. Geological age and locality cannot be established visually.

Uses & applications

Commonly used as a decorative tumbled stone, craft material, or low-cost collectible; quartzite may also serve as aggregate or building stone, while limestone is widely used for cement and construction.

Geological facts

The key distinction is hardness and acid reaction: quartzite generally scratches glass and does not fizz in dilute hydrochloric acid; calcitic limestone fizzes strongly but is easily scratched by a steel knife.

Field identification & locations

Field identification requires tests: inspect for quartz grains, try a steel/glass scratch test, and apply a drop of dilute acid in an inconspicuous spot. Similar pale pebbles occur widely in river gravels and beaches.