The brooch is from the Floreza Jewelry Line.
This company produced 1948 through 1981. They were known for intricate pieces that used high end art glass and even shell cameos. Their jewelry was sold in high end department stores. For a time Florenza also made signed compacts and lipstick cases for Estee Lauder.
I obtained this pin for $1.00 a few years ago.
The intricate filigreed golden based is adorned with glass opalescent cabochons and pink rhinestones. It has a 2" diameter.