10k Yellow Gold Rectangular Cut Black Onyx and 3pt Diamond Ring

10k Yellow Gold Black Onyx and Diamond Ring Set With; . 

One black onyx measuring approx. 10 x 8, and 5 diamonds measuring approx. 1mm. each, weighing a total of approx. 3pt. 

Weight approx. 7.7g
Size 8 1/2.
Stamped 10k (as seen in photos).