When one fisherman's anchor got stuck on what he thought was a rock during a storm, he took it with him as a good luck charm. The man found it back in 2006 in Palawan Island, Philippines and kept the 2-foot-long rock for 10 years at his house before it caught on fire and had to be cleared out. In 2016, he took the rock to a local tourism office in Puerto Princesca, where it was verified that the rock was actually a giant clam. Measuring at 1 foot wide and 2.2 feet long, the 34 kg giant pearl was said to be worth $100 million.