I want to make small stacks of stones throughout my garden w/o them falling apart and when its naked in the winter it will look cool. Thanks
You might be best to find a glue that works instead of drilling and it certainly would be less time consuming.
Another Hometalk member had a similar question back in 2016. That member wanted to glue the stones together. Here are a lot of good answers that might help. Wishing you the best.
Your best bet would be to glue the stones. Drilling may crack the stones and some may not even be drilled. Use E6000 glue or two part epoxy.