Charcoal just got bigger & more beautiful! These blocks have all the qualities of charcoal that you love, in a chunky XL form, combine that with rich natural colours and what have you got? ??" An artist??Ts dream! The blocks come in 6 muted shades from Sanguine & Violet to Sepia & Ochre. Naturally water-soluble you can use them on a damp surface and release lots of colour really quickly and build up layers of different colours as you go.