As times become even more digital, and native American jewelry books are hard to get abroad, I can recommend those two really great free videos to get a basic intro to NA jewelry. I wish I had watched them in the very beginning, to avoid so many questions new guys like me here on the forum have again and again.
Important to note that especially the second video is mostly not correctly white balanced, the stones look far much greener than they do in reality, they look like in very cold light. Just keep that in mind - the stones look more blue in reality.
Correct - what it should look like (well, massively depends on your computer and screen to show correctly):
vs what the same piece looks in the video, using the same computer and screen:
I guess you get the point.