18k Yellow Gold Round Cut 20pt Sapphire September Birthstone & 18pt Diamond Ring

18k Yellow Gold Sapphire & Diamond Ring Set With;

One round cut faceted sapphire measuring approx. 3.8mm., weighing approx. 0.20ct. each.

Four mine cut diamonds, two measuring approx. 2.5mm., weighing approx. 0.06ct. each., and two measuring approx. 2mm., weighing approx. 0.03ct. each. Total diamond weight is approx. 0.18ct.  

September Birthstone. 
Weight approx. 3.4g.
Size 5 1/2.
Stamped 18 (as seen in photos).