Pearl Diving - History of Pearls
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Pearls

fingers holding slimy-looking glob with a shiny pearl in it
A pearl inside an oyster

August 2016 - Very early in human history, maybe around 100,000 years ago, many people lived along the coasts of Africa and lived mainly on seafood - seaweed, fish, clams, mussels, and oysters. This gave people a very easy, reliable (and delicious) food source.

necklace with gold beads and shiny square beads
A mother-of-pearl necklace from Ancient Egypt
(ca. 2500 BC, now in the Louvre)

These gatherers found that some kinds of oysters (not the kind you eat) had pearls inside them. When tiny worm larvae get inside oyster shells, they are dangerous to the oyster.

9 pearl beads strung on a gold earring
Pearl earring (Roman
Empire, 100s AD)

Pearls are basically oyster scabs, or oyster bandaids, that protect the oyster from the tapeworms. They're hard, shiny spheres, and (though the oysters don't care) they also happen to be very pretty. As people left Africa and travelled around the world, they kept right on gathering shellfish and finding pearls, from India to Japan to Brazil.

mosaic of white man and woman wearing a lot of pearls
Justinian and Theodora
wearing pearls (500s AD)

By around 3000 BC, in the Bronze Age, traders were selling Arabian pearls in Mesopotamia (modern Iraq) and ancient Egypt. Ancient Greek people also dove for pearls.

Trained pearl divers (often enslaved or very poor people) dove to the bottom of the ocean and brought up oysters. In Greece and India, mostly men dove for pearls; in Japan, it was mostly women.

chinese painting woman wearing lots of pearls
Song Dynasty Chinese woman
wearing pearls (ca. 1000 AD)

You had to open up hundreds or thousands of oysters to find even one pearl, so pearls were very expensive and rare, even though pearl divers were poor. A cheaper version was mother-of-pearl, the inside coating of pearl oyster shells, which all pearl oysters have. People used this cheaper mother-of-pearl all over, from Egypt to China and Ecuador.

portrait of white man wearing waistcoat covered in pearls
Sir Walter Raleigh in a pearl
waistcoat (Britain, 1500s AD)

The rise of the Silk Road in the 300s BC encouraged rulers to send thousands of divers down to the bottom of the ocean to find pearls to sell. Kings in Sri Lanka (an island south-east of India) got rich selling pearls. Rich people wore pearls in China and Japan, in the Persian Empire, in Ptolemaic Egypt (Cleopatra wore them), and the Roman Empire. Pearls were so expensive that Roman glass workers made fake pearls out of glass-coated silver. About 500 AD, Chinese manufacturers started to put tiny Buddhas inside freshwater mussel shells so they would get coated with pearl, too.

painting: black people dive off small boats into a bay
Enslaved Africans pearl diving in Brazil.

When Portuguese ships started to sail to the Caribbean in the late 1400s, they immediately carried back thousands and thousands of pearls to Spain. Under Queen Elizabeth, British pirates seized many Portuguese cargoes of pearls and took them to England, and rich Europeans started wearing heaps of pearls. Portuguese companies forced thousands of Tupi and Arawak people to dive for pearls in the Caribbean and Brazil. When the Native people died, the British and Portuguese enslaved Africans (because they were good swimmers), brought them over, and made them dive for pearls. By the 1700s, pearl divers had killed so many oysters looking for pearls that pearls became rare again.

1920s black woman photo wearing a lot of pearls
Woman wearing pearls (1920s)

About 1895, British and Japanese biologists figured out how to get oysters to make pearls every time, by using recently invented steel needles to inject little pieces of pearl and bits of dead oysters (ugh!) inside a living oyster. By the 1920s, factories with millions of oysters were making lots of these cultured pearls, and almost everybody could afford a pearl necklace. The invention of plastic about the same time meant that if you couldn't even afford cultured pearls, you could always get plastic pearls!

Learn by doing: go see some real pearls in the jewelry department of a store
More about the history of swimming

Bibliography and further reading about pearls:

Swimming
Gold
Silver
Jade
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Professor Carr

Karen Eva Carr, PhD.
Assoc. Professor Emerita, History
Portland State University

Professor Carr holds a B.A. with high honors from Cornell University in classics and archaeology, and her M.A. and PhD. from the University of Michigan in Classical Art and Archaeology. She has excavated in Scotland, Cyprus, Greece, Israel, and Tunisia, and she has been teaching history to university students for a very long time.

Professor Carr's PSU page

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