The jewellery is all made in solid 925 sterling silver with semi-precious stones. All of our findings - earpegs, earrring backs, hooks, clasps… everything and the chain is made in solid silver we do not use any base metals. The silver is classed as hypoallergenic and nickel free. The plate is 22ct goldplate and we always plate ontop of silver. We always use 22ct gold plate because it is nickel free - 18ct gold plate is not as pure and although it is within legal requirements some people still have a reaction to it so this is why we use 22ct gold plate plus we like the richer colour of the gold. The black ruthenium that we plate some of the dogs in is a metal that is part of the platinum group of metals on the periodic table so it is also nickel free and hypoallergenic.