High end jeweller

Hi All,

I was wondering if you could help? I am looking for the most exclusive jewellers in the world that cater for the celebrities. I would like to know about the best ones based in India, US, Europe, Asia, Africa or Australia, pretty much the whole world actually. :)

I am doing a little project in this field so if you know, have read or you have heard of a great jeweller could you please let me know? I really appreciate it :)

Thank you!

Barbara