well Ken, yes and no.
if you want to make the surface of just a little puddle, no.
it will never cure and it will not level, even if you dilute it in alcohol. Very much better epoxy resin, which I tried the kind avaliable commercially in craft stores: it is easy to use, dries soon, can be painted and coloured using acrilic paints (just a drop of clear blue is enought to hue a glass of it ), is completely cristal clear it dires completely flat.
Only care is to mix in the proper proportions and seal well the area you want to cover.
Next, if you have in mind of making waves, big or small, you can add Mig water effets that, being a kind of paste, can be modelled a bit; you can add layers and build nice effects (for really big waves though i fear you need a bit more structure maybe in silicone, but never tried sofar).
Have a look at my Handriot float plane (ehm.... dont look at the plane itself as I am ashame of it compared to you jewel....) but I am satisfied how the sea tourned out ....
ciao
edo