These are pencils made from recycled newspapers, and they’re manufactured by a company called TreeSmart. As the pencils are sharpened, they produce a marbling pattern near the graphite tip.
Here’s a quote from their website: “Whole newspaper sheets are rolled around high quality No. 2 graphite. No
toxic chemicals are used in manufacturing and the eraser tips are latex
free. A special adhesive formula binds the newsprint together into a
cohesive core that is hard as wood. The pencils sharpen easily and last
longer than wood pencils.“
See (and buy) their products here: http://treesmart.com