The final of the big three birthday milestones, make sure their 21st birthday is extra special with this beautiful charm for British based jewellery brand Links of London. The sterling silver key is detailed with an 18 carat gold vermeil butterfly charm with the number 21 engraved in to it, to help them commemorate their final step in to adulthood.Links of London silver and yellow gold vermeil charmMade of sterling silver and 18ct yellow gold vermeil