This is a comparison of 1.8ct ideal cut, G color, VS1 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $23,870

White Flash: $24,561

Abazias: $25,444

Blue Nile: $25,840

Brilliant Earth: $24,005

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.