The Pearl of Lao-tze
The Pearl of Lao-tze found by an anonymous Muslim Filipino diver off the island of Palawan in 1934 is the largest pearl in the world. In 1936 Wilbur Dowell Cobb was given this pearl as a gift by a chieftain of Palawan for having saved the life of his son

Pearl of Asia
Was found in 17th century India. After the siege of Delhi it became the property of the King of Persia (present-day Iran), who in turn gave it to Chinese Emperor Qianlong.

The Imperial Hong Kong Pearl
The Imperial Hong Kong Pearl was formed in Pinctada Maxima. The Pearl origins are unclear it is believed to have once belonged to the Royalty of China and Purchased by Imperial in Hong Kong in the 1940s

Hope pearl
The Hope pearl is a white drop-shaped freshwater blister pearl of 1,800 grains (450 carats or 4 oz). One of the largest saltwater pearls in existence , the Hope Pearl was first acquired by Henry Philip Hope in the 19th century. It is on display at the British Museum of Natural History.