This is a comparison of 0.7ct ideal cut, F color, SI1 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $3310

White Flash: $3617

Abazias: $4397

Blue Nile: $3783

Brilliant Earth: $3780

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.