- 6 x 6 mm Round
 - 0.90 carats
 - AA Quality
 - eye-clean
 - Origin: Switzerland
 
A classic look for an engagement ring, this design features a 6mm round lab sapphire with .40 carats of diamonds. Two brilliant princess cut diamonds surround the vivid blue lab sapphire for a look that will never get old. Lab Sapphire is known as the gem of sincerity and trust and is the birthstone for the month of September.