mineral

Tumbled pale stone, likely quartz-rich rock or calcite

Uncertain from image; possibilities include microcrystalline quartz (SiO₂) or calcite (CaCO₃)

AI-generated identification · may be incorrect

Off-white, matte to lightly waxy surface with rounded edges and possible gray veining. Hardness is uncertain: quartz is Mohs 7, while calcite is Mohs 3 and commonly shows rhombohedral cleavage; crystal structure cannot be confirmed visually.

Identified August 17, 2026More mineral →

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At a glance

Common name: Tumbled pale stone, likely quartz-rich rock or calcite
Scientific name: Uncertain from image; possibilities include microcrystalline quartz (SiO₂) or calcite (CaCO₃)
Category: mineral
Identified: August 17, 2026
Method: Standard

AI Estimated Value

About $1–$10 for a common tumbled specimen; potentially $10–$30 if it proves to be an attractive, collectible 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

Formation & geological history

Could form as a quartz-rich pebble, siliceous rock, or calcite-bearing vein material, later naturally or mechanically rounded. Geological age and locality cannot be determined from the photograph.

Uses & applications

Common specimens may be used for tumbling, teaching, carving, or collection; decorative and jewelry value is usually limited unless confirmed as a desirable variety.

Geological facts

A steel nail or knife can scratch calcite but not quartz; dilute vinegar may weakly fizz on calcite, though a clean fresh surface gives the best test.

Field identification & locations

Test hardness, streak, cleavage, and acid reaction, and inspect with a loupe for quartz grains or calcite faces. The image alone is insufficient for a confident species identification.