This is a comparison of 1.5ct ideal cut, H color, SI2 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $10,610

White Flash: N/A

Abazias: $12,888

Blue Nile: $15,280

Brilliant Earth: $13,440

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.