I use vinegar to clean the scale(calcium/lime/etc) deposits off my humidifier and it eats that stuff up quick. I'd say it dissolved the outer layer of the stone, next time try rubbing alcohol or pipe/bong cleaner. Even just pouring a little water in there with some coarse kosher salt and shaking it around will help clean it safely...
redtails Reviewed by redtails on . My stone pipe I have a stone pipe that by friend got me from Mexico. It is made of two different stones. The bowl is made of a solid black stone, and the neck is made of a yellow/white specked stone. The whole pipe had a real pretty shine. Well, it was time to clean it, and I heard that you should soak pipes in vinegar. So I did that. Luckly I looked and my pipe again before I went to sleep. The whole cup was black. When I took out the pipe, the stone that was submerged in the vinegar was a sandy feel, and Rating: 5