This is a comparison of 0.65ct ideal cut, F color, VVS1 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $2910

White Flash: $3311

Abazias: $3699

Blue Nile: $3739

Brilliant Earth: $4000

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. For everything you need to know about buying engagement rings online, please visit http://howiboughtthering.com.