I recently acquired this and it is a DREAM!!! Its nice and heavy! (Don't drop it on your foot!) and it grinds leaves like a coffee grinder in 2 minute without the noise! I am in LOVE with mine and I hope you buy it and enjoy it for years to come. Here are some instructions on general mortar and pestle care:
1. Don't use a lot of soap. I mean sticking in in your dishwater isn't going to hurt it but don't smear it full because if you do it could absorb some of that soap and make your herbal tea taste of soap.
2. Lemon Juice! It kills bacteria, it adds to patina, and if your grinding something that doesn't smell real nice, it takes care of that pretty good.
3. To protect your counter be sure to either use this on a folded towel or glue a peace of something non-slip to the bottom. (You don't want to be chasing your pesto all over the counter.)
Well, that's about it for this review and I hope you enjoyed it. Happy Gardening!
P.S. You can get this particular Mortar and Pestle here.