Five pound, six inch diameter pearl brain goes up for sale

The second largest pearl ever found is set to go under the auctioneer's hammer next week, and may fetch as much as US$400,000. Weighing 2.25 kg (5 lb), the pearl measures six inches in diameter and bears an uncanny resemblance to a human brain. The auction lot of the massive pearl will include the lower half of the giant clam (Tridacna Gigas) in which it formed in the coastal waters of the Philippines.

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