Just finished this Mandela on a Zentangle Opus Tile, 10-1/2 x 10-1/2 inches and a Sakura Micron Pen. The top tile is drawn with no shading, the second tile has been shaded with graphite pencil.
This will be use as a possible class to teach. The tangles used starting from the center. No sure what the name of the center tangle is, if any, just a organic-like floral tangle. Next is Pinball, this is my design. Avreal, Isochor, Hybred, Betweed, "Nzeppel and Yew-Dee by Peg Farmer, CZT.