- 6 x 6 mm Round
 - 0.50 carats
 - AA Quality
 - opaque
 - Origin: Australia
 
A classic look for an engagement ring, this design features a 6mm round opal with .40 carats of diamonds. Two brilliant princess cut diamonds surround the multicolored opal for a look that will never get old. Opal is known as the gem of brilliance and mystery and is the birthstone for the month of October.