This is a charcoal picture I did of god (Mariah)
It looks better in person because you cqan see the shading and the angle the picture was taken on wasnt parallel to the paper.

A few tips for using charcoal:
Start the picture with a light outline of the main lines of the image. Trace if necessary. Preferable lighter than a H pencil. I used 6H which are rare so you might need to go to a specialist art store to get one but they do come in graphite sets. Always put emphasis on the eyes, because they are the most definitive part of a persons face. Darker eyes are better to draw with charcoal for obvious reasons. Charcoal is not preferable for lighter skin tones because there is less to fill in. Errors are not easy to erase but you can but special types or erasers-similar to BluTac-that can sweep away feint lines. Try to start from the left side if you are right handed, to minimize smudging. Fixative can be used once you are finished to prevent further smudging. Hairspray can be a cheap alternative but either way be sure not to wet the paper too much.