Review (5/5): It works!
I was skeptical, but getting desperate in trying to find something that wasn't in a plastic tube that I couldn't recycle. I am pleased to say, I was wrong, it works!
I have now been using the crystal immediately after showering and shaving my pits by wetting the stone and rubbing until dry for three weeks. It takes 24 hours of sweating profusely before I smell and my significant other tells me it is more mild than it is when I use the fragrance free, traditional antiperspirant stick I had been using. I have sensitive skin and break out when my skin comes in contact with most fragranced personal care items. I have not had any irritation whatsoever. In fact, it seems to reduce my occasional razor bumps which is a definite plus. I also have to say I appreciate the shape, the rounded, slight dome is very comfortable against my armpit and in my hand when applying.