About 8 PM on August 19th, travelling southbound on Highway 79 approx. mile marker 120 or so, Football sized rock, geode like grey/white exterior and black and crystal interior. Hurled or fell from at least twice the height of truck from a 45 degree angle to truck north west bound and hit the truck door at 75 plus MPH from side of road, fragmented into dust and left yellow sticky crystal residue that hardened into a wax like substance, when touched fresh residue, mica like crystal sparkles that slowly dissolved into my hand. Left one tiny piece of shell in truck, Not sure if hurled from the field or fell from sky. Turned around to inspect area for remnants or life forms, only to be hit again by a smaller rock on the other side from the same area. Stopped to see if any life forms were out there, heard three dogs chaotically barking, one seemed to be getting attacked. Girlfriend and I were in complete shock the entire time.