As already written by some buyers, there are damaged areas. This is in natural stone not so bad, but but if you are in the grinding section at the lowest point of the mortar. There are some rough chipping, in which the material to be ground purely depends massively, and this result definitively from the production. Of course I was curious and had to try the mortar, so I'll have to do without a return. Apart from that he crushed the mustard, I have tentatively mortared, very good. Only the ram could be a little more rounded. A per se, and also for the price, nice device, but unfortunately these chips. The neighbor was saying, their cost 9 and is harmless. But one has to say though, that almost 15 for a stone mortar are still very cheap! End of the review ...