Kief is a result of separating trichomes from the marijuana plant. Often referred to as dry sieve hash thanks to the use of screens to facilitate the extraction, kief holds the most amounts of cannabinoids, making it potent and a very pure form of concentrate. Technically, water hash or oils are purer simply because it’s close to impossible to fully detach all of the trichomes form the actual plant through a waterless extraction method.
“I can’t believe the kief that came your plant! Definitely thought it was going to be bland, then BAM!”