Moonrocks is arguably the strongest form of cannabis on the market. It’s a marijuana bud dipped in hash oil, and covered in kief to create a product that carries at 50% THC rating. Kief – also known as dry sift or pollen, is a concentrated form of cannabis. It’s made by removing the trichomes from the cannabis flower. Hash Oil – is produced by solvent extraction of marijuana and hashish. After filtering and evaporating the solvent, a sticky resinous dark liquid with a strong herbal odor (remarkably different from the peculiar odor of hemp) remains.