This is a comparison of 1ct ideal cut, D color, VS1 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $11,650

White Flash: $12,069

Abazias: $13,070

Blue Nile: $12,521

Brilliant Earth: $12,725

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.