Petrified wood is one of the most sought-after materials in the world for both its aesthetic value and its scientific value.

33 x 30 cm. (13 x 11.8 in.) Subscribe now to view details for this work, and gain access to over 18 million auction results. Purchase One-Day Pass ...

Albert Einstein’s love letters and a slew of other pricey artwork are at the center of a nasty legal battle between Christie’s Auction House and a banking billionaire who owns Encyclopedia Britannica.