This is a comparison of 2ct ideal cut, G color, SI1 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $22,160

White Flash: $26,098

Abazias: $25,279

Blue Nile: $24,561

Brilliant Earth: $25,035

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.