That wood is probably walnut, it looks semi-diffuse porous in the close-up, and it has the right color. HIckory is ring-porous. Not many North American woods are semi-diffuse porous, and that dark. The color of air-dried walnut can vary, and one of the pictures shows the classic "stripe" pattern of walnut, bands of slightly different colors, almost like zebra stripes. By the way Hickory is in the Walnut Family of tree species.