mineral

Tumbled blue glassy mineral specimen, possibly blue calcite or dyed quartz

Uncertain from image; likely calcite (CaCO₃) or dyed microcrystalline quartz (SiO₂)

AI-generated identification · may be incorrect

Small, rounded and polished, with vivid blue color, pale translucent edges, and a vitreous to waxy luster. Calcite has Mohs hardness 3 and rhombohedral cleavage; quartz has hardness 7 and no cleavage; these cannot be distinguished reliably from the photograph.

Identified August 20, 2026More mineral →

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At a glance

Common name: Tumbled blue glassy mineral specimen, possibly blue calcite or dyed quartz
Scientific name: Uncertain from image; likely calcite (CaCO₃) or dyed microcrystalline quartz (SiO₂)
Category: mineral
Identified: August 20, 2026
Method: Standard

AI Estimated Value

$1–$10 for a common tumbled or dyed piece; approximately $10–$50 if confirmed as an attractive natural blue 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

Likely a human-polished or tumbled geological material; natural blue coloration could result from minerals such as chrysocolla, azurite, or dumortierite, while uniform color may indicate dyeing. Geological age and formation environment are undetermined.

Uses & applications

Used mainly as a decorative or metaphysical collectible; quality natural blue minerals may be cut into cabochons, but this small piece has little industrial value.

Geological facts

The frosted, smoothly rounded surface and translucent margins are consistent with tumbling. A steel knife or glass scratch test, streak test, and acid reaction can help distinguish calcite from quartz, though testing may damage it.

Field identification & locations

Commonly encountered in craft shops, rock collections, and beach-glass-style tumbling; likely not identifiable to species without hardness, streak, specific gravity, or chemical testing.