This is a comparison of 1.3ct ideal cut, D color, VS1 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $20,460

White Flash: $22,648

Abazias: $23,846

Blue Nile: $23,815

Brilliant Earth: $28,570

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.