This is probably more for the U.K. smokers.

Be very wary of buying imported bud. What the unscrupulous dutch farmers are doing is throwing sand onto the buds a couple of weeks before harvest then spraying the same buds with water to set the sand in.

A simple way of telling if your bud has been contaminated with sand is to put a bit in your mouth and chew. After only a couple of seconds your mouth will be alive with the sound of crunching grit. i know this shit is back because i got offered some last night. Luckily i know about the chewing thing and i didn't buy it. Just a little tip for you U.K. heads out there, chew before you buy!