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: $19,280

White Flash: $22,232

Abazias: $21,531

Blue Nile: $21,491

Brilliant Earth: $22,680

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.