mineral

Tumbled reddish-brown mineral or gemstone fragment

Indeterminate from image; possibly carnelian (microcrystalline quartz), jasper, or garnet

AI-generated identification · may be incorrect

Small polished/tumbled piece with reddish-brown color and a darker bluish-gray edge; likely vitreous to dull luster. If carnelian, hardness is about 7 Mohs, cryptocrystalline quartz structure, no cleavage, and specific gravity near 2.6.

Identified August 26, 2026More mineral →

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At a glance

Common name: Tumbled reddish-brown mineral or gemstone fragment
Scientific name: Indeterminate from image; possibly carnelian (microcrystalline quartz), jasper, or garnet
Category: mineral
Identified: August 26, 2026
Method: Standard

AI Estimated Value

Typically $1-$15 for a small common tumbled piece; potentially $20-$100+ if it proves to be an attractive, identifiable gemstone.

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

Carnelian and jasper form through silica-rich groundwater filling cavities or replacing volcanic rocks; garnet crystallizes in metamorphic rocks. Ages vary widely from Precambrian to recent, depending on locality.

Uses & applications

Used as a low-cost gemstone, bead, cabochon, ornament, or collector specimen; jasper is also used decoratively and occasionally as aggregate.

Geological facts

The image is too blurred for reliable mineral identification; translucency, streak, hardness, and specific gravity tests would be useful.

Field identification & locations

Inspect for translucency against light, crystal faces, banding, and inclusions; test cautiously with a steel file and compare streak on unglazed porcelain. Common sources include India, Brazil, Uruguay, Madagascar, and the United States.