I just received my new EDC pen. I told William Ake at Mazurka pens what I wanted and he produced a work of art. The body was turned from malachite TruStone and was then coated with clear lacquer for protection. The fittings are coated with titanium nitride in black and gold. It has a very smooth twist mechanism and takes standard G2 cartridges. I filled it with a medium green Visconti Gel ballpoint. The pen feels great in the hand. It is on the thick side and heavy, but well balanced. I can't think of anything I would change.