This is a comparison of 1.5ct ideal cut, G color, VS1 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $18,210

White Flash: $20,831

Abazias: $21,675

Blue Nile: $20,554

Brilliant Earth: $19,850

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.