This is a comparison of 2ct ideal cut, G color, VS1 clarity round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $25,460

White Flash: $28,738

Blue Bile: $30,086

Abazias: $31,882

These diamonds are independently inspected and graded by GIA/AGS, which means you can trust their quality. The quality of these diamonds is identical--the only thing that is different is the price.