This is a comparison of 1ct ideal cut, F color, VVS2 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $11,260

White Flash: $12,042

Abazias: $12,701

Blue Nile: $12,836

Brilliant Earth: $12,580

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.