This is one of two drawings that I was 'commissioned' to do for my stepmom. This is an abstract that includes 2 of the 5 instruments that she plays: guitar and violin. This is a charcoal drawings and as with any 'smudge-able' pencil it does have some stubborn marks that would not come off>:(  

*I did not come up with this on my own. I re-drew the original picture that I found on www.123rf.com.