Coro was founded by Emanuel Cohn and Carl Rosenberger in New York in the 19th century. The company became the largest jewellery producer in the USA by the mid-1920s. Coro Craft was the company's high-end brand, and Francois and Vendome were subsidiaries. Coro worked with great designers, including Adolf Katz and Lester Gaba. The company created unique brooches such as Coro Duette and Jelly Belly. Coro used a variety of stones, Lucite, porcelain, silver, jewellery alloys, and gold-plated materials in their jewellery.