This is a comparison of 0.9ct premium cut, G color, VS1 clarity Oval cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $3660

White Flash: $3649

Abazias: $3877

Blue Nile: $4483

Brilliant Earth: $4240

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.