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: $4710

White Flash: N/A

Abazias: $5782

Blue Nile: $5199

Brilliant Earth: $5925

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.