Hi,
I'll be buying diamond studs this year as a replacement for an old pair for whom one was lost. Personally although I love Cartier, as I will go for a classic setting I dont feel like I need to get these at Cartier. But I love their standard/the ease of buying diamonds at Cartier - if you are not sure about your CCC's going to Cartier or Tiffany and Co etc gives you the assurance that they only use a very high minimum standard of diamond and you will have access to their after purchase care. Good luck!