These charcoal sticks are made of willow branches that have been burnt to a specific hardness. Unlike compressed charcoal, vine and willow charcoal
Winsor & Newton Artists' Charcoal Set of 12 - Sitaram Stationers
Coates Willow Charcoal Thin Box 25 Sticks (2-3mm) - The Drawing Room
Winsor & Newton Willow Charcoal Sticks - 3/Box – K. A. Artist Shop
Charcoal Sticks - Drawing & Pastel - Drawing & Pastel
Pacific Arc Soft Natural Willow Stick
Winsor & Newton Artists' Vine Charcoal Sticks - Artist & Craftsman Supply
Winsor & Newton Vine Charcoal Packs
Willow Charcoal, Assorted (Box of 30 ) – Art Academy Direct
Natural Willow Charcoal, 1 Giant Soft (Jack Richeson) – Alabama Art Supply
Coates Artists Willow Charcoal Powder 125ml
Winsor & Newton Artists' Willow Charcoal, Thick, Box of 3
Black Willow Charcoal Pencil Set for Sketch Drawing - China Charcoal, Charcoal Stick
Winsor & Newton Willow Thin Vine Charcoal Sticks