mineral

Tumbled feldspar-rich pebble (probable)

Likely potassium feldspar, orthoclase or microcline (KAlSi₃O₈), though the photograph is not diagnostic

AI-generated identification · may be incorrect

Rounded, opaque cream-to-orange specimen with a dull to weakly waxy luster and possible iron-oxide staining. Feldspar hardness is about 6 Mohs, with two cleavage directions and a specific gravity near 2.55–2.76.

Identified September 21, 2026More mineral →

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At a glance

Common name: Tumbled feldspar-rich pebble (probable)
Scientific name: Likely potassium feldspar, orthoclase or microcline (KAlSi₃O₈), though the photograph is not diagnostic
Category: mineral
Identified: September 21, 2026
Method: Standard

AI Estimated Value

About $1–$5 as a common tumbled pebble; higher only if testing confirms an attractive, uncommon mineral species.

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 weathered from feldspar-bearing igneous rock such as granite or pegmatite, then naturally or mechanically rounded; feldspar commonly crystallized in Earth’s crust during cooling of magma, from Precambrian to modern ages.

Uses & applications

Common feldspar is used in ceramics, glass, abrasives, and construction aggregates; attractive orange or peach pieces may be sold as inexpensive tumbled stones.

Geological facts

The orange coloration commonly comes from hematite or other iron-oxide inclusions/coatings rather than the feldspar itself.

Field identification & locations

Test against glass: it should scratch glass, but not quartz; inspect a fresh surface for two cleavage planes. A firm identification would require hardness, cleavage, streak, or magnification tests; it could also be another orange silicate pebble.