I didn't get any stones on my first flush. Just lots of chaff, sand like grit, and rice looking parasites. Not one stone at all. On my 2nd flush, lots of emerald green stones. They looked new. I didn't get the old calcified stones until my 3 and 4th flush. On my fifth, thanks to ACV and eating lots of apples I got chips of stones. I'm doing a 7 day flush, I've flushed out old stones.
Your liver is relieved to be free of the stuff you flushed out.