Blue abstract clasp

This cobalt blue piece of glass is enlivened with trails of black and metallic gold dots. Each piece is a little different. That is what makes them so much fun. The glass is vintage, but I found them in a big bin and don't really know where they are from — if I had to guess, I would say the Czech Republic. The centerpiece is set in a sterling silver box clasp. The centerpiece is a 17 mm square. The clasp is 29 mm from ring to ring. Available with one ring, two rings or three rings, please specify.