I suspect then it was probably a Copper/niobium alloy. Copper by itself isn't magnetic, and niobium is too reactive to oxygen, but an alloy of both is the only non-oxidising gold-coloured alloy with paramagnetic properties I can find,
Also, it's dirt cheap.
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I suspect then it was probably a Copper/niobium alloy. Copper by itself isn't magnetic, and niobium is too reactive to oxygen, but an alloy of both is the only non-oxidising gold-coloured alloy with paramagnetic properties I can find,
Also, it's dirt cheap.