Faux mosaic clasp

It may look like a mosaic, but it is not. This vintage glass piece has some of those vintage colors like umber, green, and yellow that are so much the rage again. The piece is most likely Czech, but it came in an unmarked bag. The centerpiece is set in a hand made sterling silver box clasp. The centerpiece is 11 mm by 15 mm, and the whole clasp measures 28 mm from ring to ring.