Venetian Glass beads in bicone and cone shapes. These Murano glass beads are measured at the middle, largest part of the diameter. They can be used in Venetian glass bracelets, Murano glass earrings or in your Venetian beaded necklaces. Sizes range from 6mm to about 21mm. Using these Murano glass bicones in your Venetian jewelry gives them an added interest by varying shapes.