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A "wireframe" version of this very pretty shape (it's the symbol for Wolfram Alpha). Sixty rhombus-shaped faces, each a "golden rhombus," with its diagonals in the famous "golden mean." Careful when wearing it, as it is kind of spiky.
Strangely, it wouldn't print in WSF, but came out beautifully in stainless steel. If you get a silver one, I want pictures!