This is a comparison of 1ct ideal cut, G color, SI1 clarity Cushion cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $4180

White Flash: $4697

Abazias: $4733

Blue Nile: $4349

Brilliant Earth: N/A

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.