MEDI STORE body piercings, a set of 2 (for both ears). I don't remember the material, but I have a metal allergy, so I wouldn't buy anything I can't use. I believe it's stainless steel. Here's the shop's disclaimer: * The shafts of our body piercings are all made of surgical stainless steel (SUS316L), but color products have a color coating applied over the base material. Individual reactions to metal allergies vary depending on constitution and physical condition. Also, the coating may fade or peel off depending on the frequency of use. * The color and texture of the product may appear slightly different from the photos depending on your device and viewing environment. I believe the stones are glass. They are not onyx. The black color and finely cut facets give them a luxurious shine. They are very beautiful items. I will sterilize them before shipping. Keywords: Pyramid, Square, Thick, Stone, Rhinestone, Black Stone, Earrings, Barbell, Medi Store, Diamond Shape, Diamond Pattern, Playing Cards, Dice, Rock, Punk, Black, Reversible, Hematite bodywell roque RIN unisex