Beautiful Black and Goldtone Filigree Brooch Pin

This is a really pretty piece of costume jewelry with black rhinestones and filigree goldtone metal. The centerpiece is made out of a black compound, probably plastic, and has a gold snowflake design embedded in it. It has a loop at the top that you could but an o-ring in to use if for a pendant. It is marked A537 on the back, and measures 2.25 inches long and 1 and 1/8 inches across. It is in very good condition, the clasps works great too. This is an auction piece, I don't know the age or maker.