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

James Allen: $4740

Abazias: $5406

Brilliant Earth: $5850

Blue Nile: $5988

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.