The grain pattern of Hickory is mostly straight, however it may wander from the straight lines to form a triangular pattern which often times comes to a sharp point. Hickory is harder than oak and highly stress resistant. The color variation in hickory can range from white to brown and may contain streaks of deep brown caused by birds pecking on the hickory tree. Hickory can take on yellow tones. With such extreme changes in color, hickory is most often sold in its calico (variegated) form but may also be purchased as a rustic product including a variety of colors, knots and other natural characteristics.