Established in 1948, Harry Kotlar & Company is a manufacturer and importer of diamonds. Located in Los Angeles, Calif., the company provides a variety of diamond rings, bands, earrings, bracelets, pendants and necklaces. Its Kotlar Cushion line of jewelry is set in handcrafted platinum and eight-karat rose gold earrings. Harry Kotlar & Company is a member of the Diamond Club West Coast, Jewelers Alliance and Jewelers Board of Trade. Its each diamond is flanked by a trio of round diamonds in set in platinum barrels.