Some more quality stock images and something a bit different I found the rarest of creatures bad weed.
kief
dabs
Good marijuana
bad marijuana the THC is suppose to amber not brown like this, there is also mold setting in in places.
now lets look at some good weed again 
difference is immediately apparent
see how the trikes are clear turning milky to amber this is the identifier of when to harvest your cannabis if you let it go to long it begins rotting and this happens