This family of American Indian jewelry is broadly called "thunderbird jewelry." It results from the recycling of a variety of materials, including plastics, but also stones (minerals). They date from the 1920s and later. These are avidly collected by a few people. I rather like them—though I don't own any. I have seen a few fairly good collections, including that of a local friend. (Our Bead Group had a presentation on these a bit more than a year ago.)

Here's a link to an essay about thunderbird jewelry:

https://www.dailypress.com/entertainment/galleriesandmuseums/dp-fea-thunderbird-jewelry-20150711-story.html