Sterling and Opal Necklace

Sterling hollow bead and tubular chain, adjustable up to 23" long, with multiple long angular pendants, each with opal settings. The middle or longest pendant in the necklace has something stamped into the back of it, but I couldn’t make it out for the life of me. I thought maybe it said “SILVER,” but as soon as I saw it the letters all disappeared and I couldn’t see it again. If you’re reading this and you know what the stamp says, please leave it in the comments! Excellent, unworn condition.