A piece of ammonite is seen in Los Angeles May 6, 2010. A U.S. auction company is to hold the "Natural History Auctions" in New York on May 27, 2010. An extraordinarily wide range of categories are offered, including mineral specimens, fossils, petrified wood, amber, ammonite, meteorites, pearls, coral, and natural history-related decor and curiosities. [Xinhua]