First of all, in my opinion, they are very good photographs, so I really am responding to the "Let me know what you think."
Here's what I like.
The sequence shots that include the the coin edge. That's nice and adds to the presentation. Not just the edge, but a different angle to contrast the head-on shot and show the degree of relief. A second one for the reverse might also be nice.
The text - informative and in a nice font (not too artistic so as to be distracting).
The small, sized (ruled) photo - again, very informative.
I think you also have nailed the lighting pretty well.
I am not a fan of the reflection effect. It was novel, but I have seen it a lot and I guess that, for me, it does not add anything.
You have a lot of blank space - now I go back and forth on that. On the one hand, it's artistically pleasing - in the way that a museum-style picture frame is pleasing. The effect as a whole makes for a wonderful book cover, pamphlet cover, flier or something similar - quite professional. On the other hand, you have a lot of blank space where you could have coin.
Overall, a very nice style of presentation - terrific job.