Someone gave me a small container of black truffle salt knowing I'm a truffle hog. The magical grains went into many dishes for the first week but noticed its addictive aroma had evaporated within ten days. Via research, I found some of these containers do not have real (black or white) truffles as the main ingredient even though they sell for as much as $30 for a 3 oz jar. Has anyone else experience this? Does anyone recommend a particular brand with the real stuff?