I recently splurged and bought set of Derwent Tinted charcoal pencils and Derwent Drawing pencils. The Tinted charcoal have various earth tones blended with the charcoal for subtle color. I experimented with a drawing of a bay horse. I drew it freehand from the source photo without my usual gridding. So the figure didn't get very well placed. But it didn't matter since this was practice for the Tinted charcoal. I don't usually draw with charcoal so I ended up treating the pencils like pastel pencils. I will need to practice with straight charcoal to better use this medium.
The Derwent Drawing pencils are thick leaded colored pencils in a range of earth tones. They are very soft and pleasant to use. I drew the horse freehand again but with better placement. I just need to practice without the grid. The drawing pencils were finished with a Prismacolor colorless blender. I will be planning some drawings that will use this limited range of earth tones.