Ancient Glass center-drilled chunky coin beads. Often called Roman Glass, these beads are cut from glass that has been buried underground for hundreds of years, giving each bead a rich and beautiful patina. Color ranges from pale and medium blue to pale and medium green. Each strand of chunky center-drilled coins is graduated with a large round coin center bead. Some strands have tube beads mixed in as well. Sizes range from approximately 10-20mm diameter.