Amazon.com : KachiKawa Artist Charcoal Sticks/Artist's Pencils/Artist crayon/Paste Natural mineral pigment (Oil colored pencil 3100-24TN) : Arts, Crafts & Sewing
Cretacolor ART CHUNKY colored charcoal stick 18mm - RDG
Amazon.com : XGOPTS Willow Vine Sketch Charcoal Sticks Tin Box Set of 10 Compressed Assorted Artist Pencils Medium Black Students Beginners Painter Art Supplies for Drawing Blending Shading Sketching, 4.5-9mm Dia :