Are your kidney / gull stones smooth like river rock, or jagged like rock candy?
Depending what is causing the kidney stones and what it is made of, it varies, but as the majority are mineral, I would venture to say, they are jagged, which is why it feels as if one is being ripped to shreds. Gall stones, unless “sandy sludge” are usually smooth, like polished rocks. You can find the answer to many questions such as this on WebMD.com and Epocrates.
