This cobalt glass marble is wire-wrapped in a silver plated spiral. Jump ring is attached. These were used to support an ocean charity called the Blue Marble Ocean Awareness Project in 2013. (started by the author of "Blue Mind") and I still have many available. Perfect for pendulums or pendants. Use them in sun catchers. The rich blue changes the viewer's spiritual perspective about water and its amazing properties just by looking at or into the mysterious blue orb. I realize wire-wrapped marbles are not a precious thing these days, but there is something very precious about the spirit behind these marbles. They raised thousands of dollars for ocean restoration and spiritual awareness of water. They will carry that energy into your creations, for sure!