This is a comparison of 1ct ideal cut, E color, VVS1 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $15,040

White Flash: $20,255

Abazias: $20,395

Blue Nile: $19,644

Brilliant Earth: $19,200

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.