Pearl with a mother of pearl bead center. In the cultured pearl industry, the resources used to create a mistaken all nacre baroque pearl is a drain on the production of round cultured pearls. Therefore, they are trying to improve culturing technique so that keshi pearls do not occur. All nacre pearls may one day be limited to natural found pearls. Today many "keshi" pearls are actually intentional, with post-harvest shells returned to the water to regenerate a pearl in the existing pearl sac. Tahitian pearls, frequently referred to as black pearls, are highly valued because of their rarity; the culturing
Pearl of Kuwait at the Victoria and Albert Museum in London, which closed on 19 January 2014. Its owners have made claims that it is the same pearl that is depicted in the portraits of Mary Tudor. The Pearl of Kuwait outweighs La Peregrina by a small amount. The pearl is currently on loan to the Smithsonian, who make no claims of its history or provenance. The Smithsonian does say that it is exceptional, that is weighs 64.4 carats, that its setting is 19th century in style, and that the pearl itself "recalls" those that originate from the Persian Gulf. Pearl of Kuwait