Does not cost much….i been googling and this is the one I have

http://www.graftons.co.uk/naturallyfresh.html

cost about - £3.49 ($7) so not much.

I use the deodorant that I use because they sell it in my shop, I have no idea if it is better or worse than any other stones.

No need to get the big stones…they last for ages.

You need to wet it and rub under the arm for longer than you think. 20-30 seconds….if you rush it…it does not work so well….needs a longer-than-you-think under arm rub.

BTW…well done for persevering with the ALA chelation….congrats and keep up the good work. My fingers are crossed for you.