Blown Venetian glass bead in a coin(flat, round shape) with a bi-color, straight line pattern. bi-color straight lines pattern and a stripe of aventurina Blown in the furnaces of Murano. Distinctive color swirls of translucent glass. Size is about 25mm(+/- 2mm) or 1" diameter and about 5mm thick, though it varies due to the handwork. No two are ever exactly alike.