This is a comparison of 1ct ideal cut, H color, SI2 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $4810

White Flash: $6908

Abazias: $6470

Blue Nile: $6199

Brilliant Earth: $6100

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.