This is a comparison of 1.5ct ideal cut, F color, VS1 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $20,410

White Flash: $21,854

Abazias: $23,457

Blue Nile: $23,352

Brilliant Earth: $23,160

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.