"Natural 8x10mm Ethiopian Crystal Opal displays beautiful pink, blue and green spectral colors. Bezel set with open back in Sterling silver. 2 mm French rope chain measures 18\". Lobster clasp with Opal bead accents." Ethiopian Opal Necklace, Opal Crystal, Rope Chain, Opal Necklace, Ethiopian Opal, Opal, Pendant Necklace, Chain, Sterling Silver