🔪Stone flakes were easy to make and sharp, but not durable.
🗡️Stone knives were sharp and commonly used, but limited in size.
🦴Bone knives were durable but not as sharp as stone knives.
🪨Slate knives were easy to manufacture and resharpen, but not very sharp.
🔷Copper knives were sharp and durable, and made use of native copper.