The gallbladder is not large enough to hold 1000's of stones, so what you are passing are not gallstones.
The fact that they resemble what others are passing, (which are also not gallstones), this just adds to the evidence, of what you are passing, not being gallstones.
Do some research on how the body works, study some anatomy, that way you will know that the gallbladder cannot contain 1000's of stones.