I don't know what it is called but Salamanca has silver work that is beautiful and unique. There are tons of shops there but I haven't run across much in Madrid. Many of the designs have sort of a beaded flower-like appearance. (great explanation, I know). I'm sure someone else knows what I'm talking about and can clarify and/or give a Madrid source.
By the way, here's a silver cleaning tip for everyone...drop your pieces into boiling water with a piece of aluminum foil and watch the nasty tarnish disappear.