This is a sculptural necklace created with oxidized silver and 22K gold. The main stone is a Phrenite that has phantom Tourmaline crystals trapped inside it (very rare see detailed photo). I actually dug up this stone myself out of South Carolina from a cow pasture then polished it up at the house. It has Amethyst & Peridot gemstones as accents that were hand-mined out of GA. The chain is adjustable.