This is the top 3 of the most expensive engagement rings given in the USA by celeb citizens.:
Number one is Elizabeth’s Taylor’s ring given to her by Richard Burton. The ring has a 33,19 ct diamond and is originally called the Krupp diamond, purchased at auction for $300,000 in 1968 by Mr Burton. This diamond is considered one of the most flawless diamonds in the world. After her death Christie’s sold Elizabeth Taylor’s diamond ring for $8,818,500.

Far less interesting but nce to know anyway; Number 2 is the ring Kim Kardashian got from Kanye West; a 15 ct diamond ring which is rumoured to cost  about $8 million.
Number 3 is Beyoné’s ring given to her by Jay Z; a $5 million 15 ct diamond ring.

see the top 20 / via whowhatwear.co.uk