mineral

Tumbled purple quartz, likely amethyst or lavender quartz

Quartz (SiO₂), probably iron-colored amethyst; exact variety uncertain from the image

AI-generated identification · may be incorrect

Mohs hardness 7; pale purple, translucent to opaque, with a vitreous-to-waxy polish and conchoidal fracture. Quartz is trigonal and lacks cleavage; density is about 2.65 g/cm³.

Identified August 14, 2026More mineral →

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At a glance

Common name: Tumbled purple quartz, likely amethyst or lavender quartz
Scientific name: Quartz (SiO₂), probably iron-colored amethyst; exact variety uncertain from the image
Category: mineral
Identified: August 14, 2026
Method: Standard

AI Estimated Value

About $2–$15 for a common tumbled piece; approximately $20–$100+ if unusually large, vividly colored, or gem-quality.

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

Mohs hardness 7; pale purple, translucent to opaque, with a vitreous-to-waxy polish and conchoidal fracture. Quartz is trigonal and lacks cleavage; density is about 2.65 g/cm³.

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids in veins and cavities, commonly in volcanic rocks; amethyst’s purple color results mainly from irradiation and iron impurities. Individual specimens may range from Precambrian to Recent deposits.

Uses & applications

Used as an ornamental tumbled stone, lapidary material, and inexpensive jewelry gemstone; high-quality amethyst is faceted or made into cabochons. This piece appears to be a polished or tumbled specimen.

Geological facts

The uniform lavender color and rounded edges suggest tumbled quartz rather than a naturally weathered pebble. The visible dark linear feature may be a fracture, inclusion, or polishing-related surface defect.

Field identification & locations

Common sources include Brazil, Uruguay, Zambia, Mexico, and the United States. Confirm quartz with a steel/glass scratch test only on an inconspicuous area; definitive amethyst identification may require microscopy or spectroscopy.