You still didn't answer the questions 3/4 of the posters asked: How was it presented? As though it was the real thing? Did he not say anything at all about it being real or fake, that he just presented something that he knew would make you happy and you assumed it would be real until you picked it up? Did your partner know it is a fake and unfortunately spent the $7500on what he thought was authentic jewelry? Or did he not know how much the real one costs and when he happened on one, he thought it was the real thing and simply bought it?
I also have to wonder what the income range of your partner is for you to immediately think he spent $7500 on a Cartier bracelet instead of a knockoff? The income range I am in I would naturally assume I was given a Target or Zales level knockoff unless told - a couple times - it was an authentic Cartier bracelet.