Charcoal: Vase
There are many ways to draw with charcoal, like actually drawing the picture and working from there. Although, the way I'm comfortable with is to colour a whole area in charcoal then literally drawing with the eraser. First off I shaped a vase, as the one in front of me, then started to smudge and erase the charcoal to create it opaque. However the real vase is transparent, in order to accomplish this task I drew what I saw through it. Such as the bottom circle and refletion of the light on the inside. Then I lightly went over with the technique I used for the opaque part. The main detail to be looking for is where it's bright and where it's dark, plus how it transfers between each.