I've been in the jewelry game for the past 5 years and I just wanted to give you my 2 cents your ring. Sorry couldn't resist
Although you do have "paperwork", it's not the kind of paperwork a buyer who will pay top dollar is really looking for. What the ring really needs is a G.I.A. certificate for the stone, however, given the quality of the diamond I can tell you it would not be cost effective to have the diamond sent out for grading.
The first issue with the stone is the depth percentage - your stone is a little too deep (3.99/6.36mm = 62.7%). Although still an "Excellent" cut stone, your dimensions are just outside of the "Ideal/Brilliant" range, which essentially means your stone is leaking light (Therefore making is appear less brilliant). A poorly cut, heavily included stone is significantly less brilliant than a perfectly cut, equally included identical stone.
http://www.drostes.com/Learn-About-Depth-Percentage_ep_112.htmlGiven that the girdle is also described as "fat", it becomes clear that when the stone was in it's rough form, there really wasn't enough "meat on the bone" for a brilliant cut stone, so they had to cut corners (for lack of a better term) to keep the stone above 1 carat.
I1 clarity can vary greatly from stone to stone. If the inclusions are large carbon spots right in the middle of the table, YIKES! If they are just small feathers near the side of the stone, they may be able to be hidden with prongs. Sounds like your clarity isn't too bad. It's good that the stone has a great color, but that can be a tough sell with other factors bringing the value down.
If this had walked into my store I would have given you my sales pitch "it's only in 14k, too deep, it's I1, thick girdle, no GIA cert" and probably would have offered you $500. Depending on the price of gold at the time, I would have come up a bit, depending on what my boss wanted to pay. He was a cheap bastard though so I doubt he'd go over $700.
Your asking price isn't too far off though. If you still can't move it in a few days let me know I'm sure I could help you get rid of it.