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: $7600

White Flash: $8764

Abazias: $9169

Blue Nile: $9197

Brilliant Earth: $9010

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.