Julian 
A Roman marble carver could make a surface smoother by covering it with more marks. The rasp did not polish by erasing every trace at once. Its flattened ends carried fields of sharp points, and every rubbing stroke laid fine scratches across the stone. Later passes crossed and overlapped them until the rougher evidence of … Read more
A Roman statue did not begin with a smooth plane or a delicate fold. It began with a large mass that had to disappear. The point chisel, an iron shaft with a pyramidal tip, performed so much of that removal that stone-carving scholar Peter Rockwell called it the workhorse of carving and estimated that it … Read more
A chisel can have a narrow edge and still be too wide to follow its own cut. As a groove deepens, the shaft above the edge begins rubbing the walls. Roman channelling tools solved that problem with a shape that changes depending on where one stands: narrow from above, thicker from the side. Art of … Read more
A flat chisel carries two corners into every cut. On an open surface they help define a clean edge; inside a hollow, either corner can bite before the centre arrives. Roman stone carvers had another option. The roundel replaced the straight cutting edge with a curve, from an obvious semicircle to one so slight that … Read more
A Roman quarryman could reach the stone with a point chisel held in one hand, or he could put the point at the end of a wooden handle almost as long as his arm. The second arrangement changed the bargain. A quarry pick with a handle up to seventy or eighty centimetres long delivered far … Read more
Roman carvers sometimes struck stone with three teeth at once. A typical tooth chisel had three to five teeth across an edge only part of a centimetre to ten centimetres wide. Each hammer blow divided itself into neighboring contacts, leaving shallow parallel lines instead of one isolated pit. The Art of Making project places the … Read more
A Roman monument could look as if gravity alone had persuaded every block to stay. Inside many joints, however, iron crossed from one stone to the next. The Art of Making project says most blocks in large Roman monuments were fixed to neighbors with metal clamps and pins, usually iron protected and secured with lead. … Read more
A Roman sculptor could carry a distance without writing it down. Open the callipers across a model’s shoulder, keep the legs fixed, then move the tool to the block: the empty gap between the points had become a portable instruction. Nothing had been marked with a numeral, yet one object could now answer another. The … Read more
Polish looks like something added to stone. In Roman carving it was often the opposite: a long sequence of removals so small that the final surface returned light instead of obvious tool marks. Emery, sandstone and pumice did not paint marble. They ground away its high points and replaced one scale of scratches with another. … Read more
A hammer blow seems too blunt to produce a clean letter. Roman stone carvers solved that mismatch by placing a narrow piece of sharpened iron between hand and marble. The hammer supplied energy, but the flat chisel decided where that energy entered, how wide the removal became and whether the next mark joined the last … Read more
