Our nitrate free nat(UR)salz rock salt has been sealed away deep in the mountains of Europe, protected from the elements over millennia. Today, this pure salt is particularly rich in healthy minerals, and is mined here in Europe. Subject to stringent quality control measures, the salt is processed by hand, and is gently ground into the crystals we use for our meat. nat(UR)salz means natural salt, because nothing is added. As it should be.