Reaction is a jewellery design company that specialised in cast and polished pewter jewellery. Former fashion silversmiths, Deborah Darling and Colin Greer design a range of brooches, cuffs and necklaces. Qt Deborah Darling  ‘They’re big, bold pieces that offer a vague sense of fusion between the Celtic and the contemporary’. They are based in Lisburn, CountyAntrim.