mineral

Tumbled red/purple quartz, possibly garnet

Likely quartz (SiO₂), potentially amethyst or iron-stained quartz; identification is uncertain from the blurry image

AI-generated identification · may be incorrect

Small rounded translucent reddish-purple pebble with vitreous luster and no visible cleavage; quartz hardness is Mohs 7, while garnet is 6.5–7.5. The dark color may result from iron impurities or lighting.

Identified August 24, 2026More mineral →

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At a glance

Common name: Tumbled red/purple quartz, possibly garnet
Scientific name: Likely quartz (SiO₂), potentially amethyst or iron-stained quartz; identification is uncertain from the blurry image
Category: mineral
Identified: August 24, 2026
Method: Standard

AI Estimated Value

$1–$10 for a common tumbled stone; approximately $10–$100+ if it proves to be attractive gem-quality amethyst or garnet.

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

Quartz forms in hydrothermal veins and cavities; amethyst develops purple coloration from iron and irradiation. Garnet forms in metamorphic rocks, commonly during regional metamorphism.

Uses & applications

Tumbled quartz is used for decoration, lapidary work, and inexpensive jewelry; gem-quality amethyst and garnet are cut as gemstones. Common specimens generally have modest value.

Geological facts

The visible form appears human-tumbled or polished rather than naturally weathered. A streak test, hardness test, and inspection for crystal faces would help distinguish quartz from garnet.

Field identification & locations

Common sources include Brazil, Uruguay, Madagascar, India, and the United States. Quartz scratches glass and has no cleavage; garnet commonly shows rounded dodecahedral crystals and is typically less transparent.