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Search for specimens: View all stibnite specimens from Herja Mine, Romania
Herja Mine is in the Baia Mare ore district, MaramureÈ County, northwestern Romania, in the Gutâi Mountains of the Eastern Carpathians. Older labels often give Chiuzbaia or Kisbánya, and the historical Hungarian and Germanized locality names can appear on antique labels, but the mine is generally treated mineralogically as Herja Mine, Baia Mare, MaramureÈ County.
The deposit is a low-sulfidation epithermal polymetallic vein system related to Neogene volcanic and subvolcanic activity. It is associated with a complex Pannonian-age intrusive stock and hydrothermal alteration that includes propylitic, argillic, phyllic, and potassic styles. The vein system strikes generally ENE-WSW and is extensive: modern summaries describe more than 250 vein structures, with 67 considered principal veins. Earlier detailed work described two major vein groups, including a southern group hosted by porphyritic quartz microdiorite and a northern group in altered sedimentary rocks of Pannonian, Sarmatian, and Eocene age. Some principal veins were mined for nearly a kilometer along strike and more than 500 meters down dip.
The ore assemblage is dominated by base-metal sulphides and sulfosalts. The main economic suite includes sphalerite and galena with chalcopyrite, pyrite, pyrrhotite, marcasite, tetrahedrite-group minerals, stibnite, and a remarkable population of Pb-Sb sulfosalts. Gold was present but subordinate; silver could be locally high in the upper parts of veins, with historical reports of very rich silver ore in certain zones. The deposit was known for massive galena ore, sphalerite-rich ore, and antimony-bearing upper-level vug assemblages. Stibnite and sulfosalt cavities were especially abundant in upper mine levels, many of which were largely mined out by the time modern collectors began documenting specimens.
Mining history at Herja is long and layered. Regional mining in the Baia Mare area has medieval roots, and local accounts often describe Herja as one of the old mines encircling Baia Mare. In the modern industrial period, Herja became part of the organized nonferrous mining and metallurgical system of the region. After the nationalization of major enterprises in 1948, the Baia Mare nonferrous metallurgical combine incorporated Herja among the mines feeding regional processing facilities, alongside better-known MaramureÈ localities such as Baia Sprie, Cavnic, BÄiuÈ, SÄsar, and Nistru.The mineâs late history is tied to the collapse of Romaniaâs nonferrous mining industry after 1990. A major workforce reduction process began in 1997, and by January 2007 only a small remnant crew reportedly remained. Local sources describe a final closure in early 2007, while mineralogical publications refer to the mine as closed since 2006. Either way, Herja should be treated as a closed underground mine. Collecting access is not a practical modern field-collecting matter; the locality is represented in collections by material recovered during mining operations, especially from the 20th century and the final decades of work.
Notable finds were not limited to stibnite. Herja produced world-class or highly significant specimens of several antimony minerals and sulfosalts, including semseyite, berthierite, fizélyite, jamesonite, boulangerite, and âplumositeâ-type fibrous material. The mine is also famous for unusual carbonate forms: black calcite, black-and-white bicolor calcite spheres, siderite spheres, and calcite associated with needle-like sulfosalts. Those curiosities matter to stibnite collectors because they reflect the same late, open-space, antimony-rich hydrothermal environment that produced the best stibnite sprays.## ãã«ã€é±å±±ïŒã«ãŒããã¢ïŒç£ã¢ã³ãã¢ã³éé±ã®ç¹åŸŽ
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Herja stibnite should be bought first with the eyes and then with a loupe. The species is soft, brittle, and strongly cleavable, so broken crystal tips, bruised edges, rubbed terminations, and collapsed sprays are common. Damage can be visually disguised in dense clusters, especially where the original form is a chaotic thicket of blades. Inspect the highest and outermost crystals, not just the front face. If the piece has calcite or baryte, check whether those associated minerals have cleaved or lost corners as well.
Old Herja labels are desirable but not infallible. Romanian stibnite from MaramureÈ has been repeatedly misattributed among Herja, Cizma, BÄiuÈ-area mines, Baia Sprie, and broader âBaia Mareâ labels. Herjaâs most typical look is the radiating ball or dense spray of short, grey-black prisms, but other Romanian localities can produce superficially similar material. Be cautious with isolated stout sprays without matrix, especially if the label is vague or modern. A good Herja specimen should ideally have a precise old label, a known dealer history, or a morphology and association consistent with the locality.
Documented fakes specific to the Herja mineral scene are better known among the carbonate spheres than among the stibnite itself. Researchers reported fake centimeter-sized black or grey âcalcite spheresâ shown at a mineral fair in Cluj-Napoca in 2016; X-ray diffraction identified them as synthetic aluminum oxide with subordinate spinel balls, coated with glued jamesonite debris and needles. That does not mean Herja stibnite sprays are commonly fabricated, but it is a useful warning: Romanian antimony-rich curiosities from this district have attracted fakery, and any improbable Herja association should be judged carefully.
Treatments are not commonly documented for Herja stibnite in the way they are for some colorful secondary minerals, but cleaning and stabilization issues matter. Stibnite should not be aggressively cleaned, oiled, acid-treated, or ultrasonically cleaned. Avoid soaking specimens with sulphosalts, pyrite, marcasite, or delicate calcite. If a specimen has a dull brownish or yellowish coating, it may be natural alteration, a secondary antimony oxide such as stibiconite, iron staining, or mine dirt; do not assume it can be safely removed.
Health handling is straightforward but worth stating. Stibnite is antimony sulfide, Sb2S3. It is not a specimen to grind, lick, carry loose in a pocket, or allow children to handle unsupervised. For normal display and occasional handling it is manageable: wash hands afterward, avoid dust, and keep it away from food surfaces.åžå Žã®å ¥ææ§ã¯ãå€ãã®é鿬§å·ã¯ã©ã·ãã¯ãšæ¯ã¹ãŠè¯å¥œã§ãããã«ãžã£ã¯äœå幎ã«ãããã倧éã®æšæ¬ãçç£ããå€ãåšåº«ãããŸã æµéããŠããããã§ãããã ããè¯åã¯å€ããããŸãããæ®éã®ãã«ãžã£ã®ã¢ã³ãã¢ã³é±ãããã¥ã¢ã«ã¯å€å°ã®æ¬ æããããã®ã宿çã«çŸããŸãããé åçãªæ¹è§£ç³ãæ¹éé±ãç³è±ããŸãã¯éæ¶ç³ã®åºæ¿ã«ã®ã£ããéãããã©ã³ã¹ã®ãšãããæå·ã®ãªãã¹ãã¬ãŒã¯ã¯ããã«çããã§ããæé«å質ã®é±ç©ã¯ãç£å°ã®æŽå²ãéé±ç¶æ ãçŸä»£ã®äžåœè£œåã«ã¯åçŸãããªãç¬ç¹ã®çŸåŠãçµã¿åãããŠããããããã¬ãã¢ã äŸ¡æ Œã§ååŒãããŸãã## Stories & Field Notes
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Nigel J. Cook and Gheorghe S. Damian, âNew data on âplumositeâ and other sulphosalt minerals from the Herja hydrothermal vein deposit, Baia Mare district, Rumania,â Geologica Carpathica 48, 387â399 (1997) â Herjaã®ç±æ°Žè系統ã Pb-Sb ç««é žå¡©ããã«ã¢ãµã€ããã¢ã³ãã¢ã³ãå«ã空æŽãèæ§é ãå ±äŒŽå²©çžã«é¢ããå¿ é è«æã
Gheorghe Damian, âThe genesis of the base metal ore deposit from Herja,â Studia UBB Geologia 48(1), 85â100 (2003) â Herjaãäœç¡«åç©ãšããµãŒãã«ç³»ãšããŠãé£ç¶ãã magmatic intrusions ãšé²åããç±æ°Žæµäœã«é¢é£ä»ããéµãšãªã岩ç³åœ¢æè«æã
Ioan Mârza, CÄlin Gabriel TÄmaÈ, Romulus Tetean, Alina Andreica, Ioan DenuÈ, and Réka Kovács, âEpithermal Bicolor Black and White Calcite Spheres from Herja Ore Deposit, Baia Mare Neogene Ore District, RomaniaâGenetic Considerations,â Minerals 9(6), 352 (2019) â Herjaã®é»ã»çœã»äºè²ã«ã«ãµã€ãçäœã®è©³çްç ç©¶ãå é±å±±è·å¡ãåç©é€šèšé²ããã®éèŠãªæŽå²çããŒããå«ãã
G. BrÄnoiu, âRietveld Structure Refinement of the Stibnite Crystalsâ â Herjaé±å±±ã®ã¢ã³ãã¢ã³ç¡«åç©ã®Xç·ç²æ«åæç²Ÿå¯åãåæç¢ºèªãåžæããã³ã¬ã¯ã¿ãŒåãã«æçšã
Mindat: Stibnite from Herja Mine, Baia Mare, MaramureÈ County, Romania â Herjaã®ã¢ã³ãã¢ã³éé±ã®åœ¢ç¶ãè²ãå質ãé¢é£é±ç©ã®çºçèšé²ã®èŠçŽã
Mindat: Herja Mine, Baia Mare, MaramureÈ County, Romania â äž»ãªç£å°ããŒãžãé±ç©ãªã¹ããååãªã¹ããæŽå²çãªç£å°åããŒããåèæç®ã
County Museum of Mineralology âVictor Gorduza,â Baia Mare â Ore Collection â å°åã®é±ç³æšæ¬ãèšé²ããåç©é€šããŒãžãBaia Mare鱿¥éºç£åèµåãšããŠHerjaææãå«ãã
Wikimedia Commons: File: StibineRoumanie.jpg â Didier Descouensã«ããHerjaã®ã¢ã³ãã¢ã³é± specimen 7 à 5.8 cm ã®èªç±ã©ã€ã»ã³ã¹åçã
Wikimedia Commons: File: Stibnite-Calcite-139573.jpg â Rob Lavinskyã«ãããHerjaç£ã®ã«ã«ãµã€ãäžã®ã¢ã³ãã¢ã³é±ãèªç±ã©ã€ã»ã³ã¹ã§æ®åœ±ããåçãå€å žçãªãããªã¯ã¹é¢ä¿ãèšé²ã## Videos & Media
ãâQPJ2378 STIBNITE, Herja, Romaniaâ â Crystal Classics, Vimeoã(https://vimeo.com/850338626) â ååŒæ¥è ã®æšæ¬åç»ãå転å±ç€ºåœ¢åŒã®ãã«ãžã£ç£ã®æ¹ééãã§ãŠãã³é±ïŒã¹ãã€ããã€ãïŒã瀺ãã
ãâStibine, Herja, Romaniaâ â Minerals and Crystals specimen videoã(https://www.minerals-and-crystals.com/product/stibine-herja-romania/) â 倧ããªåºç¶ã®ãã«ãžã£ç£ã¹ãã€ããã€ãã®ã¯ã©ã¹ã¿ãŒãç¡ è³ªã®äŒŽç€Šãšå ±ã«ç€ºãåç»ãå«ããã£ãŒã©ãŒããŒãžã
ãâImagini rare: Mina Herja Èi începuturile barajului Firiza (VIDEO)â â ZiarMaramureÈã(https://ziarmaramures.ro/imagini-rare-mina-herja-si-inceputurile-barajului-firiza-video/) â ãã«ãžã£é±å±±ã®æŽ»çºæãšåæãã£ãªã¶ãã å·¥äºã®ã¢ãŒã«ã€ãæ åãèšè¿°ããã«ãŒããã¢ã®ã¡ãã£ã¢èšäºã