As someone who suffered for years, look into a product called stone breaker, which is made from an herb called chanca piedra. There are many products, I had better luck with the liquid, not capsules. My favorite in terms of effectiveness vs. cost is Herb Pharm Stone Breaker.

It's night and day. It rounds the edges of stones and helps pass them. It's incredible. I past probably 20 to 30 in 10 years before finding this product, and it was life changing.