So years ago I bought this beat up Sea Jacopo coral dot that was grossly over reamed. I patched the inside of the bowl with some fireplace repair mortar and it came out pretty good. I coated it with rum and lit it up to set it. I've been smoking for years, but if I leave it alone for about 4-5 months, it seems to grow some kind of white stuff just on the sides. I clean it our and keep on smoking it with no ill effects, but it keeps coming back and I can't figure why. I really doesn't look like mold as it's kind of glittery and sparkly. Is it the mortar or the rum, or the tobacco I smoke in it, which is seldom the same thing. These pics aren't the best because they don't really show the sparkly white crystals, but if It's mold it doesn't seem to be very fuzzy. I have no idea what this is, but when I clean it our with a cloth dampened with 91% alcohol it seems just fine and smokes great with no funny taste. Thoughts?
