This is a comparison of 1ct ideal cut, I color, SI1 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $5670

White Flash: $6957

Abazias: $7403

Blue Nile: $7378

Brilliant Earth: $7180

These diamonds are independently inspected and graded by GIA/AGS, which means you can trust their quality. For everything you need to know about buying engagement rings online, please visit http://howiboughtthering.com.