This is a comparison of 1ct ideal cut, D color, VVS1 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $15,300

White Flash: $20,928

Abazias: $18,173

Blue Nile: $21,305

Brilliant Earth: $23,111

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.