Assertion: black truffle | /r/HasProperty | nicknamed black diamonds
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text: Prized white truffles (Tuber magnatum) from the Italian Piedmont sell for upwards of $3,000 a pound; and black truffles (T. melanosporum) from the Périgord in southwestern France—nicknamed “black diamonds” by gastronome Jean Anthelme Brillat-Savarin and a feature ingredient of pate de foie gras—will set you back to the tune of $900 a pound.