Deltah's history can be tracked back to 1892 when M.J. Karpeles established a firm specializing in pearl jewelry. The business grew and it was purchased by L. Heller at the turn-of-the-century. In the '50s, Heller merged with Sperry Corp. and the company was renamed Heller-Sperry. Heller-Sperry sold Deltah to Tevia, Gilbert and Elliott Sachs in the '60s. At that time, the brothers changed the company name to Pearls by Deltah. In 1971, Pearls by Deltah was purchased by its present owners, The Bazar Group.

Joseph Gladstone found Imperial in 1917. In 1941, he named the company Imperial Pearl Syndicate.  Throughout the '40s, he created brand recognition by recruiting Hollywood's finest, including Elizabeth Taylor and Rita Hayworth.  In 1969, Joseph Gladstone sold the company to Sidney Weiss, who then sold it to Waltham Watch Company in 1971. In 1977, the company was bought by its present owners, The Bazar Group.

On June 1, 1995, Imperial Pearl Syndicate and Pearls by Deltah were merged to form Imperial-Deltah, Inc.  Today, we are one of the world's leading pearl companies.