Turn your jewelry into one-of-a-kind wonders with the rainbow agate 12mm round beads. Agate is one of the oldest stones in recorded history. Agate includes numerous varieties of banded chalcedony. These round beads will add classic shape to your designs, so you can use them in earrings, necklaces and bracelets. 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.