Wow! you are lucky that you are getting progressively smaller numbers - thats really a good sign. I don't really know the difference between emerald green and jewely bright green - to be honest I've had stones (in the same flush) probably of both shades of green. Either way a very intense colour - just sometimes darker and sometimes more luminous. Guess it depends on the exact composition.
Also some of my stones are surrounded by brown "crud" which comes off with washing.
I agree that what comes out looks exactly like the stones in the pictures from the liver/gall-bladder.