This unnamed writing utensil is by Alberto Essesi, a Milan-based industrial designer. Essesi says he “created” the tool and describes it as if it’s been fabricated, but I believe it’s just a concept, judging by the images.
“A simple tool I created for myself. I saw a documentary about how we used to use rocks to sketch on walls and there was something that intrigued me. I grabbed a rock and tried to sketch, I noticed that i was forced to create long and bold lines, focused on the larger form rather than details, each line flowed and had a certain energy to it.”
“I of course had to take this rock to the next level. The sphere is created of polished aluminum through the middle section and sand blasted anodized aluminum to the sides. The center is hollow to reduce weight and the tip of the pencil is easily replaceable as well as uses ‘infinite graphite’ that lasts incredibly long and replicates the feeling of a smooth stone grinding against a surface.”
While I think it’d take a while to get used to, I’d be very curious to try drawing with this.