mines of quicksilver which were accidentally discovered in 1497. Since 158o they have been under the management of the government. The mercurial ore lies in a bed of clay slate, and is found both mingled with schist and in the form of
excellence of the ore is the greatness of the yield of pure metal compared with the amount of the refuse. As regards the quantity annually extracted, the mines of Idria rank second to those of Almaden in Spain, which are the richest in the world.
End of Article: IDRIA
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