The Coro jewelry company was first established at the turn of the 10th century, in 1901. Emanuel Cohn and Carl Rosenberger each lent the first two letters of their last names to make the firm name of Coro. Coro was incorporated in 1913; their first factory was located in Providence, Rhode Island, as were the manufacturing plants of many other jewelry companies.
The firm was successful as one of America’s leading jewelry companies until the 1970s. The firm went bankrupt and the last remaining part of the company – in Canada – was sold in the late 1970s.
During Coro’s lifetime, there were factories and offices in many American cities, as well as in Canada, England and Mexico. Coro was active in Mexico during the World War II period, and in England during the 1960s and early 1970s. Very little is known about Coro’s UK operations.
Coro employed many talented designers throughout the life of the company and also held patents on items such as frames for their Duette line.
For more information on Coro and its history, designers, patents and marks, you can visit Researching Costume Jewelry on Illusion Jewels; Luda Tovey’s Coro research pages; Mary Walden-Till’s short history of the company at Maenads’ Gems UK; and Jim Katz’s Jewelry Patents website.