The 'by the yard' was quite in fashion - actually this girdle setting as is: nothing new if you were tracking jewelry auctions.
The most interesting to date - at lesat for me - woudl be the bean and jade coil models comming from Maory nephite carvings (ok, those are famous, widely known and much older than Tiffany's piece, no escape).
You've got neo-clasic patterns in their gold pieces and... vitually every design has a serious, traceable tradition. This could sound un-creative, but it is very hard to choose such iconic models and shapes. The history of decorative arts is full of them though. It makes a nice 'sport' to track them down
I suppose it's like art and movies. No ideas are ever really new, just recycled.
Look at music and movie how they remake everything from the past. I guess people remember the one from their generation, or the one with the most marketing!