mineral

Small rounded pebble, likely quartz-rich stone

Indeterminate from photograph; possibly microcrystalline quartz (SiO₂) or a weathered silicate pebble

AI-generated identification · may be incorrect

Gray-brown, opaque to slightly translucent, fine-grained, and rounded; surface appears dull to weakly vitreous. Quartz has Mohs hardness 7, no cleavage, conchoidal fracture, and specific gravity about 2.65, but these properties require testing.

Identified August 11, 2026More mineral →

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At a glance

Common name: Small rounded pebble, likely quartz-rich stone
Scientific name: Indeterminate from photograph; possibly microcrystalline quartz (SiO₂) or a weathered silicate pebble
Category: mineral
Identified: August 11, 2026
Method: Standard

AI Estimated Value

Typically under $1 as an unidentified pebble; approximately $1–$10 if confirmed as an attractive quartz or chert specimen.

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 a naturally weathered and water-transported pebble formed from an older igneous or metamorphic rock; its geological age cannot be determined visually. The rounded shape indicates abrasion in a stream, beach, or sediment deposit.

Uses & applications

A specimen this small has little industrial or jewelry use unless testing reveals an attractive mineral or gemstone variety; it may serve as a teaching or curiosity specimen.

Geological facts

The photograph does not show diagnostic crystals, banding, fossils, or cleavage, so a precise identification is not reliable. A glassy edge, hardness against steel, and lack of reaction to dilute acid would support quartz-rich material.

Field identification & locations

Test streak, hardness, translucency, magnetism, and acid reaction; inspect a fresh fracture with a loupe. Common look-alikes include chert, jasper, weathered feldspar, and ordinary gray stone.