Imperial-Deltah is a noted leader in the United States pearl jewelry market. Along with Giovanni Jewelry, an importer of costume jewelry, these two units combine to form The Bazar Group, the brainchild of founder and owner Banice Bazar. As a manufacturing representative in the 1970s, Mr. Bazar saw the coming growth potential in pearl jewelry and purchased three of the lines he had represented: Pearls by Deltah (1971), Giovanni Jewelry (1973), and Imperial (1977). The company's century-old history as mavericks in the cultured pearl market, particularly the valued Japanese Akoya, has created a brand synonymous with top-quality pearl jewelry products and superior, comprehensive customer support in all facets of the business

Its history can be traced back to 1892, when M.J. Karpeles established Deltah, the nation's oldest firm specializing in fine cultured pearl jewelry. Deltah, which later expanded into manufacturing simulated pearls, was purchased by L. Heller at the turn of the century. Heller later merged with Sperry Corp. in the 1950's. The new firm, Heller-Sperry, sold Deltah to Tevia, Gilbert and Elliot Sachs in the 1960's, who renamed it Pearls by Deltah. Banice Bazar and his Bazar Inc. purchased Pearls by Deltah in 1971.

Imperial was founded by Joseph Gladstone in 1917, later renamed the Imperial Pearl Syndicate in 1941. It was during the post-war period that Imperial became the first to bring the valued Akoya pearls to the United States from Japan. A unique marketing campaign helped to establish brand recognition throughout the 1940's and 1950's. Both Imperial and Deltah pearls were marketed in ads featuring some of America's most notable theatre icons, including Elizabeth Taylor, Shirley Temple, Loretta Young.