The stone has a certified appraisal as well as it's EGL (European Gemological Laboratory) Diamond Certificate. The certificate number is: US 4022804D. The ring is stunning. I am also including the two side diamonds in with the price as a little added incentive. I have also had the ring appraised and the appraisal lists the center stone at a value of $7028.00, I am listing the ring for $3500 but I will for sure negotiate the price. As you can see I am taking a major hit on the price. 

The information for the center stone is listed below: 

1.16CT Marquise Brilliant 
10.71 x 5.30 x 3.40mm 

The proportions are: 
Depth-64.2% 
Table-54% 
Crown-16.2% 
Pavilion:-41.7% 
Girdle-Very thick to faceted 
Cutlet-None 

Finish: 
Polish-Good 
Symmetry-Good 

Clarity Grade: SI1 
Color Grade: H 

Fluorescence: None