Have a trial to make random color and random transformation. Happy sharing. https://www.cgian.com/2022/05/how-to-make-random-color-and-randomize-transform.html
I used for this a script which would allows to mirror-copy transforms. This was max 2010 though.. not sure if there is an integrated tool with modern versions
Looking good!!! Loving these sharp boulders. However ... be prepared for a Poop paintover transforming them all into a field of penis heads. Just sayin'.