Look at the base of the brooch

Dating vintage trifari jewelry brooches

It has a spring inside the ring that allows it to open and snap closed. The other types of clasps continued to be used, and are still used today. It is obvious that Trifari and Coro patent information can be used to date pieces of their manufacture.

The author is attempting to date pieces of this jewelry to specific decades. Look for a trombone-style catch.

The clip mechanism

William Tassie invented a glass paste in that was used to make copies of famous cameos. Look for Corocraft features. This style was used for a short period of time around and again in the s to the present. Other sources confirm dating this style of Florenza charm bracelets to circa s.

Safety pin clasps were also popular and were used from the late s until the early s, and are still used on some hand made pieces today. In the s, a new type of clasp using a hook and extender became popular for costume jewelry necklaces. Cameos are portraits carved in shell. Pieces with stones would sometimes have foldover clasps that were decorated with matching stones. When available, copyright information can be used in the same manner.

Trifari and Coro advertised

The clip mechanism has been improved over time and clip earrings are still quite popular today. Trifari and Coro advertised extensively during the s, s and s, as did many other costume jewelry companies. Monet had a patented, rounded sister clasp used in its jewelry in the s and s.

At the time of the copyright law change Trifari had a number of necklace, bracelet, and earring clasps that it continued to use for several years until the stock of these ran out. This style has a small movable piece that holds the pin in place on the C-shaped catch. The sister hook clasp was popular in the s and s.