Inspired by molecular structures, this necklace fuses elegance and scientific wonder. Available four dual-tone colour-ways, this stunning piece is sure to be a conversation starter! Embrace the convergence of art and science and let this exquisite necklace ignite your imagination. Materials All metals are brass finished with plating (see below) *Orbs are solid acrylic with silk coating (*Nickel Free) *Orbs for the GG, GA & GQ colour ways are Tinted Glass *(Please note: these glass beads are sturdy and are not easily broken). Due to the glass-making process, each bead may have colour variations. Finishing 12K Gold, Rhodium, *Black Zinc on brass (*Nickel Free) Dimensions 0.5 mm brass chain, plating as noted above Approximately 18" long + extensions Overall, pendant portion 6 1/2" long x 1"wide. The largest orb beads are 1/2" dia.