Very recently someone posted a video of a gallbladder disection here. The most outstounding thing on the vidio to me were the lil green balls in that video and the dr doing the disection never even mentioned them. I also couldn't help but notice they'd taken out a gallbladder that was NOT chock full of gallstones!!
You've just passed "stones" ... the vatiety of what you will see as you flush is wild at best ... I've seen stones that were the size of pencil lead, ones that were at least 1" ... I've seen stones that were pea green to dark green, black, tan, multi-colored ... I've passed stones that look like they had critters hanging out of them and/or critter legs.