What is the meaning of Indian jewelry?


I have been searching for information on the significance of Lakota jewelry in the past. I am a teacher and during watching a film on Lewis & Clark, which included some references to the Lakota, some students were very interested in the pictures of the beautiful bear claw necklaces, etc. They wanted to know what the jewelry really meant. So far, I’ve had no luck with internet searches. Can you help?
~Submitted by Jewell S.