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

James Allen: $6990

White Flash: $8145

Abazias: $8075

Blue Nile: $7769

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.