Carefully hand made by me using quality products. The earring back pieces attached to the resin piece are nickel free due to those of us that have nickel allergy. All the pieces are handmade by me, buffed and polished by me. I take careful time to make these and they are sparkly and colorful and bright. Three of my favorite adjectives! Hand washing is suggested with non abrasive products which will scratch the resin and/or damage it.