I think that is the etcetera necklace. It's one necklace. I'm not sure if they are still selling it or if it's just for display. They have used it several times in the fsh window displays over the past few years but I have never seen it displayed for sale. There is also a matching bracelet. I have to imagine that the cost would be at least 8000-10000 euros based on other items I have purchased. But I'm guessing.
Btw, there an Etcetera necklace in the Dc store. I saw it yesterday and it is very beautiful. Clearly a statement piece, not something i'd be able to wear everyday. The price is around $8000.
And i also verified that the farandole 120 and 160 are the same thickness (not that there was any doubt at this point). Not a small necklace by any standard but it gets lost on me, as Eagle also said.