GemDuo beads are a unique type of glass beads known for their diamond shape and dual holes, which are precisely spaced 4mm apart. These beads are versatile components in jewelry making, allowing for intricate patterns and strong structural designs due to their ability to accommodate wires or threads up to 20 gauge thick. Sold per 10-gram bag which is approximately 68 to 75 beads, depending on the bead finish.