Tourmaline Vertebra sterling silver necklace.Currently in stock Ready to ship. Rose cut Watermelon Tourmaline. Hand cast mammal vertebrae with flora soldered and bound by rope, representing the cycle of life, death and rebirth, leading to immortality. 20" in length, textured rolo and disc chain variant. In History and Folklore: Tourmaline was called the Ceylonese Magnet because it has pyroelectric and piezoelectric properties it because electrically charged, and magnetic, when rubbed or heated.