This is a comparison of 0.9ct ideal cut, G color, VS2 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $4990

White Flash: $5470

Abazias: $5382

Blue Nile: $5531

Brilliant Earth: $5995

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.