A
crayon (or wax pastel) is a stick of colored
wax,
charcoal,
chalk or other material used for writing or drawing. A crayon made of
pigment with a dry binder is a
pastel; when made of
oiled chalk it is called an
oil pastel. A
grease pencil or
china marker (UK
chinagraph pencil) is made of colored hardened
grease. There are also watercolor crayons, sometimes called water-soluble crayons.