There's a White Crystal by a Swiss company called Dr Ray Seeds. Here's a link but it doesn't tell you very much. http://www.londonseedcentre.co.uk/pls/dad_g21web/lsc_product?p_supp_name=Dr%20Ray%20Seeds&p_supp_id=9##
It' s weed. From the family headed by White Widow. Upon first encounter, it may well be hard to believe it isn't dusted with something, but it's just resin glands.