I remember leaving home and going on a "healthy me" phase, I purchased a body crystal for around $15 at the time, it was a whole new concept to the normal roll on deodorant, with this one you have to wet the surface before rolling it under your arm pits, it does feel strange because its not as smooth and soothing as normal deodorants but it does work! I would compare it to a hard rock and rubbing it under your arms, it kept sweat at bay especially in Summer and it lasted a lot longer than the average roll on.
Also being a big fan of black, it never leaves any residue or marks on your clothing, back then it was so hard to find a deodorant that didn't leave any marks. It has the tiniest salty smell which doesn't overpower any perfumes that you wear.
This is a fantastic deodorant and goes above and beyond on what it says it would do. I realised I used less deodorant when I was using this because it did the job the first time and I didn't have to keep re-applying thru the day.
I will admit I purchased this a little sceptically as I have used quite a few natural deodorants that just have not delivered, but this turned out to be well worth it! It didn't stain my clothes like many of those white ones you buy,and worked really really well at keeping me odour free! I like that it had no smell as when it comes to natural deodorants many of them use essential oils and some can be too overpowering! I also recommended to my best friend who bought one too and is loving it!