Material：Pendant: alloy; chain: 304 stainless steel; stone: natural volcanic stone. Packing list： 2 necklaces, 6 0.63 inches（16mm）volcanic lava stone ball, 6 teardrop shape volcanic stones; 1 nice gift box. They are aromatherapy necklaces, which are both essential oil diffuser pendant Locket and women's favorite jewelry. They are housed in exquisite gift boxes, so they are also a favorite Christmas gift for women, New Year gifts and birthday gifts.