This is a tiger's eye necklace. I remember having it made at a store in Shibuya's Center-gai for around 10,000 yen at the time. I recall that it was 80% tiger's eye, with garnet for the purple parts, and moonstone for the white beads. The clasp is in poor condition, so perhaps someone could disassemble it and attach a new one. I can add more photos if you'd like. Natural stone Power stone