Black diamonds. Truffles are compared to jewels for good reason. They are the most expensive edible mushrooms in the world. The professional kitchen truffle slicer carefully handles this culinary treasure. You can adjust the desired thickness using the knurled screw – from 0.2 to 3 millimeters. This device is also suitable for slicing Parmesan, onions, garlic, mushrooms, radishes, and daikon. After all, truffles don't appear on the table every day. By the way, contrary to popular belief, pigs are rarely used for truffle hunting anymore, as these bristly animals often eat their finds. Truffle dogs, on the other hand, have no interest in the valuable mushrooms. France and Italy are well-known for their truffles, and black specimens of good quality also come from Australia. In Germany, this delicacy is considered a particularly protected species and may only be collected with a special permit.