100 Francs Great Wall of China

Niger's micro-gold series of the early 2010s was produced under licensing arrangements common among several West African CFA franc states, where the nominal issuing authority holds little practical involvement in design or distribution — the coins were marketed primarily to European collector markets with no meaningful circulation in Niger itself.

At 0.5 grams of .9999 gold, the piece contains roughly a thirtieth of a troy ounce.