A diamond broker I talked to recently mentioned an interesting heuristic: he never buys diamonds that are exactly 1 carat, because he figures the person cutting the diamond almost certainly sacrificed some quality in order to bring it up to that magic number. and he never guys diamonds that are .98 or .99 carats either, because he figures the cutter was trying to sacrifice quality for the magic number, and then screwed up besides.
Posted by bug to Snippits at September 3, 2007 5:13 PMHmm... Interesting point.
I found that buying at the Jewelery Exchange in S.F. dropped the price of a diamond by a bit over half. We shopped through Ritz Jewelers in the end, but did buy an off the rack ring.
I actually had a relative who wanted to see the certificate. :)