Here is what the Doenetwork link states about the girl's Jewelry:
Jewelry: Three Silver rings that resembled American Indian or Mexican handmade jewelry. One piece was a faceted band with red, white and blue stones. Another ring had a oblong black stone. The third was a large, intricate feather scroll band with a jade insert into the curves of the scroll.
Looking at the link, you see the second and third rings, but not the first. The year 1976 was when the country was celebrating the Bicentennial. There was Red, White, and Blue stuff in abundance that year. My guess is that the first ring was something of a Bicentennial nature.
The other two rings seem to be good quality Indian made silver rings. The oblong black stone seems to have some turquoise pieces set into it. The turquoise stones are naturally shaped, but the black oblong stone is very symetrical, which is something of an anomaly in regard to Indian Jewelry, since symetrical stones are not normal. Usually the silver is worked into the natural shape of the stone.
I believe that the third described ring is likely the best piece of Indian Jewelry, and the most unique. It might be the piece which can be linked most easily to the craftsman who made it. I believe that the narrative is incorrect, however. It does not appear to be a Jade stone, but rather a Red Coral stone and a Turquoise.