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

James Allen: $7250

White Flash: $8613

Abazias: $9532

Blue Nile: $9777

Brilliant Earth: $9470

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.