These multi wire twisted hoops encase clear crystals. I purchased these crystals at the fabulous Bead and Button show last summer. They were not labeled so I don't know with certainty what they are. I can tell you that they look very earthy and interesting bound, all around, by the copper wires. I oxidized the entire earrings, including the crystals, so they have an aged, almost ancient effect. They are approximately 3" in length from the bottom of the crystals to the top of the niobium earwires. Why niobium? It is a pure alloy that wearers with sensitive ears can wear with no reaction. It is so pure that it has been approved for surgical implants. It also matches the color of the oxidized wire perfectly! These earrings have been sealed with microcrystaline wax to preserve the rustic patina.