The exterior of the mortar and the handle of the plunger, are made of polished stone. The optics I personally find very nice and fits well in accordance with our kitchen. The interior and plunger head are made of roughened granite.
The problem is that when Mörserer granite dust arises, like other Rezensionisten wrote, I can not confirm that. Rubbing our granite on granite This happens naturally, but in normal use, I could not tell the abrasion can go had in the Mörsergut. (Tip: Before the first use, we have the mortar cleaned with a steel sponge.).
In the use of the mortar has everything get small, which we gave him and without much effort. Be it grains for example, breads, various spice blends or even a pesto for pasta, everything worked out perfectly. By the roughened surface also smooth grains are well grasped and crushed. Since reducing the cat and mouse game to a minimum.
The cleaning works well, with one but if the weight, of course, have to be careful.
Over time, the shell changes color a little, because the whole ingredients (mainly oils) left their traces that you can not get away without any tools.
All in all, the perfect helper for us, who has found his place.