These earrings are handcrafted by me. I start with a stainless steel earring post and they have flat backs that screw on. I then crush the stone and then preserve it in resin of many different shapes. when that has cured I then attach the stone to the earring post. Please see attached photos for more info on each stone meaning & uses. These are great for any of my fellow Bohemian gypsy souls. These come from a smoke free home. Peace, Love & light to you all