On Sale – our fabulous Birthstone Hoop Earrings are made from 925 silver and the gold ones have 18k gold plate on top. Choosing their birth month earring can show the thought you have put into their present. Alternatively, choose the stone you like and know they will wear. Either way, birthstone jewellery birthday presents are always a hit! Perfect jewellery for 18th birthday presents or jewellery 21st birthday presents.