I found some INCREDIBLE Ethiopian opal beads that are super fiery and HUGE. Center opal bead measures 16.5mm in diameter! The opal beads taper down to 10.35mm, which is still pretty large. There's a total of 57 cts of opal here. I had these opals strung with faceted onyx beads, accented with turquoise beads and 18k yellow gold and emerald rondels. Clasp is a 14k yellow gold spring ring. Necklace measures 16" long.