This is a comparison of 0.9ct premium cut, G color, VVS2 clarity Radiant cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $3750

White Flash: $4229

Abazias: $4110

Blue Nile: $4575

Brilliant Earth: $4360

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.