Thuya Burl Pen Blank An exquisite pen blank crafted from Thuya Burl (Tetraclinis articulata), one of the most prized and distinctive burls in the world of pen turning. Images are representative. An exquisite pen blank crafted fromThuya Burl (Tetraclinis articulata), one of the most prized and distinctive burls in the world of pen turning.
