Big Leaf Maple Burl wood with artistic dyes, Applied under pressure (not a wipe). Measure approximately 5-3/8" x 5/8's. I also inlayed Turquoise, Copper shavings, then it was dyed with three colors, maybe 4, applied finish, and last but not lease 15 set sanding process, buffed to a radiant shine.... Truly one of a kind pen.