Tourmaline Bead Necklace, 2mm, 2 Rows. This necklace has a lovely sparkle to it. If you are a tourmaline lover, this is a terrific everyday fine bead necklace. It has been strung with a Beadalon wire [ trademark name] which is a steel wire twist with a vinyl coating. the ends are crimped and have a crimp cover. This necklace can easily handle a pendant's weight. Sterling findings with a lobster claw clasp.