Pyrite with Siderite on Pyrite after Pyrrhotite, Calcite

specimen number:
2312600

location:
Herja mine, Maramures Co., Romania

description:
Bright lustrous crystal groupings of golden pyrite measuring to 3.0 cm in diameter on a matrix of crystallized siderite, the siderite crystals coating previous crystals of pyrite replacing pyrrhotite. Calcite is present as well. A neat combination piece in great condition.

The Herja Mine, historically known as Kisbanya and located in the Maramures County of Romania, is a legendary underground mining district with operations dating back to medieval times and expanding heavily through the 19th and 20th centuries. Geologically, the deposit is situated within the Neogene volcanic arc of the Inner Carpathians, featuring complex hydrothermal vein systems hosted in volcanic and sedimentary rocks driven by extensive magmatic activity. Mineralogically, Herja is world-famous among collectors and museums for producing some of the finest epithermal ore specimens ever found, most notably brilliant, razor-sharp crystals of stibnite, berthierite, quartz, and various sulfides that display exceptional crystal size and metallic luster.

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