mineral

Tumbled brown translucent mineral fragment

Indeterminate; possibly quartz/chalcedony or weathered feldspar

AI-generated identification · may be incorrect

Small tan-brown, translucent, rounded fragment with a dull-to-waxy luster and no clearly visible crystal faces. Hardness is visually uncertain: quartz/chalcedony would be Mohs 7, while feldspar is about 6; cleavage is not apparent.

Identified September 4, 2026More mineral →

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Physical properties

Formation & geological history

Likely a naturally weathered or transported mineral grain, possibly from volcanic or sedimentary rocks. The image cannot establish geological age or exact formation process.

Uses & applications

If quartz or chalcedony, it has minor collector and lapidary interest; otherwise it is an ordinary pebble with negligible commercial value.

Geological facts

The brown coloration may result from iron-oxide staining or inclusions. Its small size and rounded form suggest abrasion in stream, beach, or soil environments.

Field identification & locations

At approximately 18.8°N, 95.8°W, weathered volcanic-derived minerals and quartz-bearing sediments are plausible. Test cautiously: quartz scratches glass and does not scratch easily with a steel knife; feldspar may be scratched by steel. A close-up beside a scale, plus streak, hardness, and transparency tests, is needed for identification.