I have read about the idea of the stones being formed as a result from the flush itself.
I have done over 20 flushes and must point out that yes, some of the later fushes produced light green stones that would fit this exapmle. But the 1st and 2nd flush I ever did i remember that i got a very (UK 50 pence size) red stone (or 2) that were very hard and marbled with black. Surely this could not have been made there and then. it felt like it had been lodged in me for years!
I am very open minded and will be curious to read any potential reply.
I must point out that this forum (Truth in Med) has re-kindled my interest in curezone (it has been dormant for a few years now).