Here is a site that has thousands of quality photos of various Native Art items, please check the Ethnographic link provided for research purposes.
Here is a small sample of photos to be found, very beautiful at the very least
The first is of an unknown origin - it is believed to be a Gourd from a Medicine bundle, which I believe is correct, judging by the strength of the object I have no doubt it is powerful in purpose and use.
The second photo is a Comanche peyote Fan circa 1825.
The saddles are Crow design featuring High back plains styles rarely found today.
Crow work has the signiture seperation of colors by using white.