its probably fertilizer, when sum ppl hang their plants they grew upside down to dry the fertilizer that is on the soil around the base of the plant will fall into the buds then get dried on there sometimes. i bought bud like this b4 and thought it was crack or blow and i was happy,lol when i asded the grower he told me it was jjust fertillizer and i was like shit...anyways yeah smoke that shit up just b4 u bust it up look for any shit on the budand pick it off or sometinor just smoke it anaways.