حجم هذا العرض: 718 × 599 بكسل الصورة بدقة كاملة (750 × 626 بكسل، حجم الملف: 89 كيلوبايت، نوع الملف: image/jpeg)
Banded agate. The specimen is one inch (2.5 cm) wide.
Picture made without a camera by laying the carving on a flat bed scanner.
Released to the public domain by Adrian Pingstone in May 2003.
In case this is not legally possible: Arpingstone grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.