try to evaluate the % by smoking it,,,,average stone is around 15,,,,,very good is 20,,,,and very very stone is 23,,,,,,,,and calculate,,,28g 20%...5.6 gr of thc,,,,,5600 mg for 200gr of oil,,,,,28 mg for 1 gr of oil,,,,it is a guess i know but i cannot really know for sure of any true % of the...