Abstract: There is disclosed a novel process and apparatus for producing a light weight, self aligning, building block from straw, corn stalks, sugar cane, kenaf and like vegetable based fibrous materials wherein the vegetable based fibrous material is used as an aggregate base to be beat/mixed with one or more binders, sprayed with one or more wetting agents and deposited in to a mold to be subjected to sufficient compression forces having certain alignment enforcing capabilities, to form a pre-determined size, shape, density and thickness finished building block, then ejected for sufficient curing.