$260Median
698Sold (12 mo)
$225Last sale
Semseyite with Pyrite after Pyrrhotite, Galena, Sphalerite
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Small metallic sprays of semseyite are scattered across the top of this galena and sphalerite crystal matrix. Present throughout are platy crystals of what were once pyrrhotite, these now replaced by crystallized pyrite. In good 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.
Semseyite is an uncommon lead antimony sulfosalt mineral. First described in 1881 by Hungarian mineralogist Jozsef Krenner based on material from Baia Sprie, Romania, it was named in honor of the Hungarian aristocrat and mineral collector Andor von Semsey. Geologically, semseyite typically forms in mid-temperature hydrothermal veins, often associated with other sulfides and sulfosalts like sphalerite, galena, jamesonite, and pyrite. Mineralogically, it crystallizes in the monoclinic system and is characterized by dark gray to metallic steel-black tabular or elongated prismatic crystals that frequently form rosette-like or radiating aggregates, with world-class specimens historically originating from the famous mines of Romania.
Product details
SpeciesPyrite, Galena, Sphalerite, Semseyite, Pyrrhotite
SizeCabinet
Dimensions13.5 x 8.0 x 1.0 cm
Added on08/25/2026
LocalityRomania, Maramureș County, Herja Mine
Current owner
Unknown Owner
Previous owners
| Date | Collector | Acquisition price |
|---|---|---|
| — | Weinrich Minerals | Not disclosed |
Learn more
Mineral guide
Learn about Pyrite
brilliant metallic luster, perfect cubes, and golden color; collectors prize affordable pieces to top specimens, with Navajún and Huanzala localities.Regional guide
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