Modern and mixed media such as wax crayons, pencils, oil pastels, oil sticks and oil bars have become increasingly popular, although many age poorly and most have to be kept under glass.
pencil
From Conté crayons to oil pastels, stick media have many advantages and are rightly popular today. Here are examples by Millet, Seurat, Redon, Schiele, Bonnard, and others.
The Eclectic Light Company 