It's a graphite pencil sculpture by Batle Studio. Made of the same material as normal pencil lead except it's been treated with a polymer that prevents the staining of hands. These pencils wear very slowly and are supposed to last between 7 to 9 years with normal use. My favorite is definitely the quill pictured above. Sadly, it was out of stock except for the display model.
Do I let that deter me? Of course not! What else is google for, right? So I was able to find a cheaper source online with free shipping to boot! Yay!
Here are some other designs that I like:
And in case you're wondering, here's a photo of what the actual "writing" from the quill looks like: