| Locality type: | Mine |
| Classification |
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| Species: | Semseyite |
| Formula: | Pb9Sb8S21 |
| Comments: | Herja has produced the world's finest Semseyite specimens |
| Habit: | Blades and cockscombs of parallel blades |
| Colour: | grey black |
| Luminescent properties: | none |
| Quality for species: | Excellent - world class for species or very significant. (!!) |
| Confirmation |
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| Validity: | Believed Valid |
| Associated Minerals Based on Photo Data: |
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| Siderite | 105 |
| - var Sphärosiderite | 43 |
| Sphalerite | 102 |
| Galena | 86 |
| Fizélyite | 42 |
| Calcite | 41 |
| Quartz | 41 |
| Pyrite | 33 |
| Chalcopyrite | 32 |
| Pyrrhotite | 32 |
| Plumosite | 24 |
| Boulangerite | 20 |
| Tennantite Subgroup | 15 |
| Tetrahedrite Subgroup | 14 |
| - var Silver-bearing Tetrahedrite | 1 |
| Dolomite | 10 |
| Freibergite Subgroup | 8 |
| Marcasite | 7 |
| Jamesonite | 3 |
| Ankerite | 2 |
| Zinkenite | 1 |
| Covellite | 1 |
| Data |
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| Mineral Data: | Click here to view Semseyite data |
| Locality Data: | Click here to view Herja Mine, Baia Mare, Maramureș County, Romania |
| Photo Gallery | View Gallery (140 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 9938 |
| Long-form Identifier: | 1:3:9938:7 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Semseyite |
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| 5.1km (3.2 miles) | ⓘDealul Crucii adit, Baia Mare, Maramureș County, Romania |
| 5.2km (3.2 miles) | ⓘMinei Hill open pit, Baia Sprie mine, Baia Sprie, Maramureș County, Romania |
| 5.8km (3.6 miles) | ⓘBaia Sprie mine, Baia Sprie, Maramureș County, Romania |
| 8.7km (5.4 miles) | ⓘSăsar Mine, Săsar-Valea Roșie mining area, Baia Mare, Maramureș County, Romania |
| 31.8km (19.8 miles) | ⓘCizma Mine (Cisma deposit), Poiana Botizii, Băiuț, Maramureș County, Romania |
| 49.2km (30.6 miles) | ⓘTurț Mine (Ghezuri Mine), Turț, Satu Mare County, Romania |
| References |
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Herja Mine, Baia Mare, Maramureș County, Romania