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

James Allen: $2740

White Flash: $3127

Abazias: $3358

Blue Nile: $3461

Brilliant Earth: $3750

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.