You know, I didn't even think about those when I commented; but I guess they are pretty ubiquitous (you'd have to be ubiquitous jewelry if you're advertising on TV). My first thoughts still go to the myth / Pandora's Box - I feel like people who aren't well-versed in Greek Mythology still have heard of that one (along with the Labors of Hercules and Perseus vs. Medusa).
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