A rare specimen of Acanthite and Nickeline from the polymetallic orebody at M?d?nec in the Kru'n' Hory mountains o the Czech Republic. The Acanthite forms relatively large and well developed equant crystals averaging around 5 mm diameter and of a metallic lead grey with a dull to silky lustre. These sit within a vuggy, sponge-like matrix of grey-bronze Nickeline with a cellular, porous structure. Acanthite was not commonly found at M?d?nec, making this nicely crystallise specimen all the more interesting.
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