Cymbal Provatas Antique Brass Plated Earrings for GemDuo. Cymbal™ is a unique, imaginative, and groundbreaking metal component line that has been designed to fit and integrate with the most popular bead working beads in the market. They can be worked into a project just like the bead itself and will create shine, glitter and pop wherever they are used. These earrings are made with titanium hypoallergenic posts. Earring backs are not included.