I've seen pictures of necklaces similar-looking to the one you've linked below, but those seem to be Santo Domingo. Unless I misunderstand, the loopy bit(s) seem to be referred to as a jocla, and it seems to be a separate piece attached to the main strand. But that's just inference on my part.
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It is hard to convey five-dimensional ideas in a language evolved to scream defiance at the monkeys in the next tree. --
The Science of Discworld III: Darwin's Watch, by Terry Pratchett, Ian Stewart & Jack Cohen