i also got some bud with green crystals in it and thought it wAS glass or something i brought it back and the guy told me it was normal and wanted to buy it back from me so i smoked the crystals and got stoned. turns out that when you stress a plant by pinching young leafs the plant prouducess this crystal all over the stem. maby some of you are getting this and thinking its contaminated. i know there is also bad bud out there too