These beautiful stud earrings are made with Sterling Silver stud posts and Genuine Finest Quality European Crystal Elements. ~Flat back style crystals with butterfly push back closure ~Crystal size 6.4mm ~Dark Rainbow crystal has a foil coating applied to the back of a clear crystal that mimics an oil pattern creating a very unusual metallic effect ~Sterling Silver fixings ensures all pieces are hypoallergenic ~Each set comes gift boxed This jewellery is made in the UK using Sterling Silver (Ag925) fixings and Genuine Finest Quality European Crystal Elements from certified suppliers.