mineral

Small translucent mineral fragment, possibly calcite or quartz

Probable calcite (CaCO₃) or quartz (SiO₂); image resolution prevents confident separation

AI-generated identification · may be incorrect

Pale gray to cream, translucent, irregularly broken, with a glassy to pearly luster. Calcite has Mohs hardness 3, rhombohedral cleavage, and fizzes in dilute acid; quartz has hardness 7, conchoidal fracture, and no cleavage.

Identified September 7, 2026More mineral →

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At a glance

Common name: Small translucent mineral fragment, possibly calcite or quartz
Scientific name: Probable calcite (CaCO₃) or quartz (SiO₂); image resolution prevents confident separation
Category: mineral
Identified: September 7, 2026
Method: Standard

AI Estimated Value

Approximately $1–$10 as an unidentified fragment; more if confirmed as an attractive, well-formed crystal.

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 crystallized or vein mineral formed in hydrothermal cavities or sedimentary veins; age depends on its host formation and cannot be determined from the photograph.

Uses & applications

Calcite is used in cement, lime, fillers, and occasionally as a collectible crystal; quartz is used in glass, electronics, abrasives, and jewelry. This small fragment has little commercial value.

Geological facts

The specimen appears to show internal layering or cleavage surfaces, which may favor calcite, but those details are not diagnostic in this image.

Field identification & locations

Test hardness against a steel knife and apply a drop of vinegar or dilute hydrochloric acid: calcite scratches easily and effervesces, while quartz does neither. Common sources include limestone caves, hydrothermal veins, and quartz-rich pegmatites.