Joseph Warner founded the Warner Company in 1953. The Warner jewelry produced is known for its high quality workmanship and superior and brilliant rhinestones and other materials using a Japanned blacken metal base which is a finishing process on metal using a black coal-tar derivative. The Warner jewelry is not very common and because of its better quality of workmanship, superior rhinestones and materials and Japanned metal settings, the jewelry found commands above average pricing in the collector’s market today. Other manufacturers of jewelry, using Japanned metal backings, rhinestones and other materials do not demonstrate the workmanship or the pieces do not contain the brilliant stones and materials which distinguishes them from the Warner pieces. Mark: "WARNER". The company ceased operations in the early 1970s.