This is a comparison of 1.5ct ideal cut, F color, VS2 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $16,960

White Flash: $21,927

Abazias: $21,423

Blue Nile: $20,224

Brilliant Earth: $21,000

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.