- 4mm Round glass beads Aquamarine, also known as Druks, are pressed-glass beads made in the Czech Republic. They are made in small quantities by hand, so appearances may differ. Size: Outer Diameter: 4mm. Hole size: 0.7mm. Material: Pressed Glass. Quantity: 15 Inch Strand – Approximately 100 beads. Color: Aquamarine Blue – Color number 60023
