I received this from a friend several years ago, but I haven't used it, so I'm putting it up for sale. I was told by my friend that they purchased it from a vintage shop. I searched for blue stones, and it looks like turquoise or Larimar, but I'm not certain. Please consider it based on the design. I think the design is simple and cool. It has a thin screw chain. There are no brand markings or material specifications. It reacts slightly to a magnet, so please refrain from purchasing if you have allergies. The total chain length is 64cm. Please check the photos for other details. Thank you.