If your speaking of before the coming of the europeans, it would be a blade of flint, obsian, or similar rock. the handles would have been antler and the blades would have been attached with sinew and pine pitch glue, or hide glue. When he eurpoeans came they traded cheap plain carbon steel blades in the form of "butcher" style knives, mainly the English and Germans. The french traded similar butcher style knives in carbon, but they also had a couple of other style carbon steel blades. The handles wwere usually hardwood. During the fur trade "era". There were many baldes, the 1st most common type being the russell "green river" knives. They had carbon blades. The 1st ones they made were butcher style knives with hardwood handles, pinned, then later riveted on. They also came up with a skinner blade, "dadely" style blade, which was more of a modified clip blade, resembling more of a spear than anything else. They also later made many blade sizes and shapes. Sheffield england and Germany also produced many blades, bowies, spear blades, etc. Many came up with different knives for trade to the indians. You have to take into account an indian would use any knife they could get their hands on, trade for, etc. They also, some, very few, made their own knives from scrap iron, swords, etc. these were usually quite crude, but serviceable. They would also use file blades, but this was not done very often. Contrary to what most believe, files were valuable commodities and rarely did blacksmiths use file blades for knife making. As far as indians making their own. This was not done until much later (late 1800's).
I hope this helps some?