Wikipedia
Usage examples of "cultured pearl".
He sat at the open partition that gave on to a handkerchief of garden and then the sea wall and gazed gloomily across the water at a giant statue of a man in a bowler hat and morning coat that Tiger had told him was Mr Mikimoto, founder of the cultured pearl industry, who had been born at Toba and had there, as a poor fisherman, invented the trick of inserting grains of sand under the mantle of a live oyster to form the kernel of a pearl.
The chests at her feet were loaded with a mass of jewelled trash--diamante anklets, gilt clasps, tiaras and chains of zircon, rhinestone necklaces and pendants, huge earrings of cultured pearl, overflowing from one chest to another and spilling onto the salvers placed on the floor like vessels to catch a quicksilver rainfall.