sedimentary or metamorphic

Tumbled golden-brown stone, likely sandstone or iron-stained quartzite

Indeterminate from image; probable quartz-rich sandstone (SiO₂) or quartzite

AI-generated identification · may be incorrect

Opaque tan-brown, rounded and smoothly worn, with a dull to subtly satin luster. Quartz-rich material has Mohs hardness about 6–7; visible grain texture and weak layering would favor sandstone, while a dense sugary texture favors quartzite.

Identified August 28, 2026More sedimentary or metamorphic →

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At a glance

Common name: Tumbled golden-brown stone, likely sandstone or iron-stained quartzite
Scientific name: Indeterminate from image; probable quartz-rich sandstone (SiO₂) or quartzite
Category: sedimentary or metamorphic
Identified: August 28, 2026
Method: Standard

AI Estimated Value

Typically $1–$5 as a small common tumbled specimen; generally under $10 unless provenance or unusual patterning adds collector interest.

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 from deposited quartz sand later cemented into sandstone, or metamorphosed into quartzite; iron oxides produce the golden-brown color. Exact age and locality cannot be determined visually.

Uses & applications

Commonly used as a decorative tumbled stone, landscaping material, aggregate, or teaching specimen; it has little jewelry value unless unusually attractive or distinctive.

Geological facts

The rounded shape probably reflects tumbling or natural abrasion rather than crystal growth. A streak, hardness, and acid test would substantially improve identification.

Field identification & locations

Look for individual sand grains, pores, or bedding for sandstone; a fused, glassy granular texture indicates quartzite. Common sources include sedimentary basins and quartz-rich metamorphic terrains worldwide.