Turn your jewelry into one-of-a-kind wonders with the rainbow agate 8x16mm rectangle beads. Agate is one of the oldest stones in recorded history. Agate includes numerous varieties of banded chalcedony. The rectangular shape of these beads perfectly shows off the unique colors and patterns of each bead. Gemstone beads are the perfect way to add natural beauty to your jewelry designs. Since gemstones are formed naturally, each bead is a unique treasure. These gorgeous gemstone beads are available by the strand, so you'll have plenty to work with.