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Petrified Wood Sphere. Madagascar

Characterized by its rich coloration with tones of red, brown. It is rare to see a sphere of petrified wood, much less one of such large size, diameter 12in, weighing approximately 42.5 kilos. Sold for $3,600 (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