8mm Black Stone Beaded Hand Knotted Necklace 925 Vermeil Chinese Symbol Clasp

8mm Black Stone Beaded Hand Knotted Necklace W/ 925 Vermeil Chinese Symbol Clasp with Safety Latch. Necklace measures approximately 27" long. My research leads me to believe that this is the symbol for good fortune. The beads register in the garnet tourmaline section of my gem tester so I'm not sure what they are. There does seem to be some light coming through them when I hold them against my finger. Really cold to the touch. N1380