These Czech glass fire-polished rondelle beads are manufactured in the centuries-old Bohemian center of bead production. They offer almost as much sparkle as crystal beads at a more affordable price! Choose from 4mm, 7mm, 9mm, 11mm, and larger sizes of rondelles (a.k.a. roundelles and roundels) in a rainbow of colors. These faceted glass beads work great for making antique-style jewelry, or to repair and update genuine vintage jewelry. They are created by pressing glass in a mold, and then roughly faceting the formed bead. Finally, the bead's surface is slightly melted to "fire polish" it and give it increased luster. This process slightly rounds off the facets.