The Noble Collection has just added Galadriel's Brooch to it's collection. It's made with sterling silver and mother of pearl. I think it's a bit too shiny compared to the pics on the extended FOTR dvd gallery, but it's nice.
You can check it out at http://www.noblecollection.com/catalog/product.cfm?id=NN9233&catid=17
A beautiful piece of jewelry...I think it is unique looking...has the feel of Galadriel, if not like so much the movie one though. I checked out the photo of Galadriel, and agree...they differ, but I could see Galadriel wearing the one at Noble Collections...Seriously am thinking of getting it for my mother...that or Gandalf's brooch. Its a beauty as well.