This is a comparison of 1.5ct ideal cut, F color, VVS2 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $22,750

White Flash: $23,861

Abazias: $24,971

Blue Nile: $23,822

Brilliant Earth: $26,180

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.