This set can be worn individually or stacked together. The stones are genuine Green Apatite, Lapis, and Moonstone. The rings are size 6 and the stones are 3mm in size, set in sterling silver. Natural Stone Rings, Green Apatite, Best Lip Balm, Stacker Rings, Stone Rings Natural, Body Balm, Copper Earrings, Moon Stone, The Rings