Kief (also known as dry sift) is a marijuana extract that consists of the trichomes or resin glands found on cannabis flower. It is in these tiny, hairlike structures that the terpenes and cannabinoids that gives cannabis its unique properties are produced. As a result, kief has much higher concentrated amounts of THC than the rest of the cannabis plant making it a highly valued substance. The problem with kief is figuring out the best way to separate it from your marijuana flower. Luckily, there are a few different ways you can go about doing just that.