I cannot recommend this. The granite on the inside is unfinished and has a powdery residue, likely the stone. If you are grinding dry items, it should be ok. If you try to grind moist items such as garlic or onion, it would definitely get trapped in this. It also poses a risk for someone with food allergies since it cannot be properly cleaned. Also, this is a beast! It would be very difficult to pick up to move and clean.I would go with a marble mortar and pestle vs. granite.