I bought this for a weird purpose, but it works great! I use this to crush my hair chalk and mix it water, to make it easier to apply to my hair. Surprisingly, it's super easy and turns out way better than just rubbing it on my hair. This Marble Mortar and Pestle were really simple to use and worked quickly. I just put the hair chalk in and started smashing. It's smooth on the outside, and rough on the inside, for better grip when crushing things. It's pretty heavy also, and stays solidly on the table when in use. Overall, I really like this and highly recommend it.