This is a comparison of 1ct ideal cut, I color, VS1 clarity Oval cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $3120

Abazias: $4165

Blue Nile: $4197

Brilliant Earth: $4390

These diamonds are independently inspected and graded by GIA/AGS, which means you can trust their quality. The quality of these diamonds is identical--the only thing that is different is the price. For everything you need to know about buying engagement rings online, please visit http://howiboughtthering.com.