The black and pink multi-faceted, fire crackle agate beads were handmade, heated, and dyed in order to achieve this striking look. Because the beads are handmade, you will find slight variation among them-which adds to their charm. I complemented the agate beads with faceted black Swarovski beads and ended the 19-inch necklace with a simple ' Foot D. toggle fastener. The agate beads are about 14 mm. D. (1/2") The black beads are 8 mm. and 6 mm.