Fossil Coral Egg. Serpehov, near Oka River, Russia

This ancient coral displays coloration of beige, brown and red hues and a fascinating hexagon cellular structure. The carving and polishing has been done in such a way as to orientate the crystallized, drusy geode cavity to the center. Height 4in - Estimate: $500 - 700 - Unsold.  (Copyright © 2002-2008 Bonhams 1793 Ltd., Images and Text All Rights Reserved)

Bonhams. Natural History, 22 Jun 2008. 220 San Bruno Street, San Francisco // 7601 Sunset Blvd., Los Angeles. www.bonhams.com