mineral

Tumbled cream-colored stone, possibly quartz or calcite

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

AI-generated identification · may be incorrect

Smooth, rounded, opaque cream-yellow surface with subdued vitreous-to-waxy luster and minor brown inclusions. Quartz has Mohs hardness 7 and no cleavage; calcite has hardness 3 and prominent rhombohedral cleavage.

Identified August 30, 2026More mineral →

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At a glance

Common name: Tumbled cream-colored stone, possibly quartz or calcite
Scientific name: Indeterminate from photograph; likely microcrystalline quartz (SiO₂) or calcite (CaCO₃)
Category: mineral
Identified: August 30, 2026
Method: Standard

AI Estimated Value

About $1–$5 as a single common tumbled stone; higher only if testing confirms an attractive, identifiable rare 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 occurring pebble subsequently tumbled and polished; quartz or calcite formed in hydrothermal veins, sedimentary deposits, or cavities, with age dependent on its host rock.

Uses & applications

Used as a craft, lapidary, or decorative stone; comparable pieces are common in tumbling mixes and generally have little commercial value.

Geological facts

The image alone cannot reliably distinguish quartz from calcite, limestone, yellow jasper, or another pale stone.

Field identification & locations

Test hardness: quartz scratches glass, while calcite is scratched by a steel knife and fizzes strongly with dilute hydrochloric acid or vinegar (if calcite-rich). Common sources include quartz-rich gravels and carbonate formations worldwide.