This was bought at a Native American Cherokee heritage festival in Tennessee from a member of the Cherokee tribe doing jewelry making demonstrations. I’ve asked an expert in beads that buys, sell, and travels all over the world doing that what he thinks the stones are and he thinks the main pendant is turquoise and the smaller beads are magnesite which are formed from crushed stones and dust and usually sold as turquoise beads in the Native craft markets. The silver beads I think are silver tone and not sterling but they haven’t been tested. It’s a beautiful necklace, 26” long over the head.