You want to commemorate and event, congratulate someone with a special token. Do it with sea glass. Pick out the color glass - cobalt is rare so its is more expensive. All my glass is locally sourced - What do you want on the back side let me know, name? date ? school? geographical coordinates? If you have a special piece send it to me and if its doable, I'll set it! Check out some of my beaded necklaces , they truly compliment these rare gems . Please allow a 3-6 weeks from when the order was received.