mineral

Purple quartz-bearing pebble, possibly amethyst or lepidolite

Likely quartz (SiO₂) with iron-related purple coloration; exact identification requires testing

AI-generated identification · may be incorrect

Small tumbled/abraded specimen with lavender-purple body, tan-gray host or coating, and dull to slightly vitreous luster. Quartz hardness is Mohs 7, with no cleavage and conchoidal fracture; apparent hardness and texture may be altered by inclusions or weathering.

Identified August 23, 2026More mineral →

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At a glance

Common name: Purple quartz-bearing pebble, possibly amethyst or lepidolite
Scientific name: Likely quartz (SiO₂) with iron-related purple coloration; exact identification requires testing
Category: mineral
Identified: August 23, 2026
Method: Standard

AI Estimated Value

Approximately $1-$10 for a fragment of this size and appearance; higher value requires confirmed, transparent, well-colored amethyst.

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 formed in a hydrothermal vein or cavity, where silica-rich fluids deposited quartz and trace elements produced the purple color. The image alone cannot establish geological age or distinguish amethyst from purple mica or another mineral.

Uses & applications

Potentially a decorative or lapidary specimen; quality amethyst is used in jewelry, while ordinary fragments have mainly educational or collectible value.

Geological facts

Amethyst’s purple color commonly results from iron impurities and irradiation. A quartz identification can be tested with a steel file or glass-scratch test, though this may damage the specimen.

Field identification & locations

Common sources include Brazil, Uruguay, Mexico, Zambia, and the United States; inspect for transparent quartz, crystal faces, and glassy luster. The visible tan material may be host rock or iron staining.