mineral

Tumbled cream-colored pebble, likely quartz or calcite

Indeterminate from photograph; possibilities include microcrystalline quartz (SiO₂) or calcite (CaCO₃)

AI-generated identification · may be incorrect

Smooth, rounded, opaque white to cream surface with a dull-to-waxy luster; hardness is approximately Mohs 3 for calcite or 7 for quartz. No visible crystal faces or cleavage can be determined.

Identified August 25, 2026More mineral →

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At a glance

Common name: Tumbled cream-colored pebble, likely quartz or calcite
Scientific name: Indeterminate from photograph; possibilities include microcrystalline quartz (SiO₂) or calcite (CaCO₃)
Category: mineral
Identified: August 25, 2026
Method: Standard

AI Estimated Value

Typically $1-$10 for an ordinary pebble or tumbled stone; potentially higher only if confirmed as a collectible gemstone or unusual mineral.

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

Smooth, rounded, opaque white to cream surface with a dull-to-waxy luster; hardness is approximately Mohs 3 for calcite or 7 for quartz. No visible crystal faces or cleavage can be determined.

Formation & geological history

Likely a naturally water-worn pebble or human-tumbled specimen derived from a quartz-rich or carbonate rock; its geological age and source formation cannot be established visually.

Uses & applications

Commonly collected as a curiosity, craft stone, or aquarium/landscaping pebble; little commercial value unless testing identifies a distinctive gemstone variety.

Geological facts

The key distinction is hardness: a steel knife or glass-scratch test can separate calcite from quartz, though testing may mark the specimen. Dilute hydrochloric acid or vinegar may fizz on calcite, but not quartz.

Field identification & locations

Field identification requires hardness, streak, and acid tests; common sources include river gravels, limestone terrains, and commercial tumbling media. The image alone is insufficient for a confident species identification.