TPF may earn a commission from merchant affiliate
links, including eBay, Amazon, and others
Fancies are harder to judge "cut" quality compared to a round or a princess. You will have to do some side-by-side comparisons to find what makes your eyes light up, and as long as an appraiser agrees, that's all that matters.
I think a lot of people confuse diamond shape with cut since we describe the shape of a diamond by calling it a certain type of cut, etc. So, Marquise round brilliant cut refers to the diamond shape, whereas each diamond also has a cut rating, ie. excellent, very good, good, fair, or poorly cut. It's probably the most important spec in a lot of ways, but, oddly, seems to be the forgotten spec.
So, tell your jeweler that you want a marquise with an excellent rated cut (if that's what you want). Hope this helps.
Yes, I am definitely going to look at the appraisal carefully before purchase.
Step 1 - Cut Spec
Here is reference for cut spec.
http://www.pricescope.com/wiki/diamonds/marquise-cut-diamond/
Step 2 - Check stone in Person
Check bow-tie, brightness, fire, and shape.
Yes, be careful with the cut, that's what affects the sparkle. I'd stay with Excellent or Very Good. Maybe get advice from the people at Pricescope once you have narrowed down stones--but be aware that they tend to be very perfectionistic and can make you nervous about very nice stones (and also that they tend suggest a very narrow group of vendors, all of whom are great but there are other good people out there.) I strongly recommend them, but do think you should keep these two things in mind.
My concern would be, if you go down from F color, you might notice that the stone is lower color (yellower) and it might annoy you, if you are used to the iciness of "F". Marquise are not like round brilliants, they hold color and show color more, especially in the tips. This is something to be aware of before thinking of going down as low as an H (which is great in an ideal cut round brilliant and still very white, but maybe not so much in a marquise). Also, marquise stones show it more when they are lower clarity also.
I say this as someone who is currently buying (on layawaY) a marquise which is I color and SI3 (I1, really) clarity and that is fine with me because the price is really right, and it's not my e-ring--it's just a fun piece of bling. If it were my e-ring, I would be a LOT more picky (and expect to pay more, which wouldn't be hard, as it's only $1500).
Congrats on your upgrade; how exciting, enjoy your new stone.