Two Australian gold nuggets are on display before sale at auction, May 6, 2010 in Los Angeles. Bonhams & Butterfields' upcoming National History Auction, on May 27 in New York, will afford bidders the opportunity to own an unusal selection of prehistoric fossils, archeological artifacts, gold nuggets, meteorite slices and even a Martian meteorite discovered in the Mojave Desert in 1999. The nugget at left has an estimated sale price of USD 190,000 - 220,000 and is considered especially rare because it shows no evidence of tool marks or preparation by man. It weighs 3,869.3 grams (8.49 lbs) and measures 5 x 4 x 4.25 inches (12.7 x 10.2 x 10.8 cm). AFP PHOTO / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
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