16" + 2" Multistone Tree of Life Bead Necklace 16" + 2" extension necklace with dyed colored, czech glass, black onyx and wooden Tree of Life bead. The rondell czech glass beads are 3mm x 5mm, the faceted round czech glass beads are 12mm, the faceted black onyx beads are 6mm, the faceted Synthetic Turquoise dyed colored beads are 17.5mm, and the Tree of Life wooden bead is 26mm. This necklace has a lobster clasp closure. .925 Sterling Silver