This is a comparison of 1.8ct ideal cut, G color, VS2 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $22,720

White Flash: $23,555

Abazias: $24,422

Blue Nile: $25,092

Brilliant Earth: $27,890

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.