mineral

Tumbled quartz-rich pebble, possibly citrine or iron-stained quartz

Quartz, silicon dioxide (SiO₂), with probable iron-oxide inclusions

AI-generated identification · may be incorrect

Hardness 7 Mohs; translucent honey-yellow to brown, vitreous-to-waxy luster, irregular granular texture, and no obvious cleavage. The rounded shape indicates natural abrasion or tumbling; inclusions/cloudiness prevent confident gemstone identification from the image alone.

Identified September 7, 2026More mineral →

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At a glance

Common name: Tumbled quartz-rich pebble, possibly citrine or iron-stained quartz
Scientific name: Quartz, silicon dioxide (SiO₂), with probable iron-oxide inclusions
Category: mineral
Identified: September 7, 2026
Method: Standard

AI Estimated Value

About $1-$10 for a common small tumbled or iron-stained quartz pebble; $10-$50+ if naturally colored, unusually transparent, or locally documented.

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 commonly crystallizes in igneous, hydrothermal, and metamorphic environments; iron staining can produce yellow-brown coloration. Quartz ranges from Precambrian to modern deposits and is found in veins, pegmatites, sedimentary gravels, and weathered rock.

Uses & applications

Used widely in glass, electronics, abrasives, and engineered stone; transparent citrine-quality material is used in jewelry. This small included pebble is primarily a collector or novelty specimen.

Geological facts

Natural citrine is uncommon; much commercial “citrine” is heat-treated amethyst. A scratch test against ordinary glass can help distinguish quartz, though it may damage the specimen.

Field identification & locations

Common in quartz veins and river gravels worldwide, including Brazil, Madagascar, the United States, and Australia. Look for conchoidal fracture, glassy surfaces, and inability to scratch it with a steel knife.