TierraCast earring posts from the You Asked Collection provide an elegant way to add Swarovski crystals to DIY post earrings! Choose from earring posts with a setting to add your own 34ss round flat-back crystals (approximately 7mm), and earring posts with gorgeous 34ss Swarovski XIRIUS flat-back crystals already in place. Both options come with a loop for adding your own custom dangles! Individual crystal colors come in pairs, and sets of birthstone crystal findings come in packs of 24. TierraCast is a great choice for earring findings, made with titanium posts and lead-free Britannia pewter settings. The gold-plated, antiqued brass, and antiqued copper settings also meet the EU Nickel Directive.