These olivine druks are made from transparent yellow-green glass partially coated in an iridescent finish. Try these beads with copper or brass components for a vintage style design. At 4mm in size, they work well as spacer beads or as the main element in a delicate piece. These beads come in a pack of 100. Czech glass druks are round pressed-glass beads made in the Czech Republic. These beads are still made in small quantities by hand. Be sure to explore the rest of our Czech glass druk beads for other colors and sizes.