I purchased these VERY high quality Ethiopian opals intending to keep the strand, but it is not getting enough wear, so it's now up for sale. The opals are very hard to capture in photos and videos -- they pick up so many flashes of color depending on what they're worn with. The opals range in size from 4.5mm to 8.5mm. I hand knotted the opals and the total length of the strand is approximately 23 inches. These opals have FIRE and the pictures do NOT do them justice. Poshmark will authenticate for the buyer, but if you like opals--you will NOT be disappointed. Thank you SO much for looking through my items!