Well after a lot of consideration I've decided to get one of my 1 oz kookaburra's, drill a hole in it, thread through a piece of string...BINGO a new necklace
Just get synthetic diamonds. They are physically the same as mined diamonds but only about $100 per carat.
get her plastic fakes, she wont know its not real how many wives would know difference between real diamonds and fakes, just find a receipt around an expensive jewelery store someone dropped so you have "proof"