Speaking of ostrich and emu, yes! I love that stuff. The emu is much more prominent with those large scales at the toes and shin area while ostrich is rather flat but they both look very dinosaur like eh?
Yes, ray skin is most all colored in one way or the other, and its sanded at the eye area. Take any of those colors and sand the surface and you find white calcic nodes. I had the good fortune to work with some rawhide ray skin a while back and its totally different than the finished stuff. The eye actually has a hook like appearance to the nodes, it will rip ya wide open if you rub it wrong. Its an off white color as well. I walked up on some sting rays on our coast one year, these were brownish in color. They were surfing of all things, I could see them inside the waves as they came toward me. Odd feeling.
I am curious about that company as well, the leather looks and is worded a lot like Tandy. Prices are almost too good to be true, I agree. I might have to order something soon as well.