Arco Valley Pearl is the biggest pearl for sale in the world, but not the largest in size. The 9.45 inch Pearl of Allah found by a diver off the Philippine island of Palawan in 1934 carries that title.The "Arco Valley Pearl", 3.1 inches in length, will be up for bidding at Abu Dhabi's Emirates Palace and on the Internet, where it is estimated to fetch up to $8 million.via Neatorama
The value of the saltwater pearl is based on its size, color, weight, exclusivity, history and records of what people have been prepared to pay for similar precious items.The 575-carat pearl from 12th century Mongolia once belonged to Chinese emperors, Persian kings, the grandson of Genghis Khan and Marco Polo.
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