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Techereu (Tekerő), Hunedoara Co., Romania
Five genetic types of quartz varieties are present: (1) chalcedonies associated to the Mesozoic “ophiolitic” complex; (2) polychromatic jaspers in Cretaceous conglomerates; (3) variously-coloured chalcedonies in Paleogene rhyolites; (4) siliceous nodules, jaspers and silicified wood within the Almaşu Mare Gravel (Badenian); (5) reworked chalcedonies and jaspers in Quaternary deposits.
Mineral List
| 'Flint' Opal var: Milk Opal | Quartz var: Agate | Quartz var: Bloodstone var: Carnelian | Quartz var: Chalcedony var: Jasper |
8 entries listed. 1 valid mineral.
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References
Zepharovich, V. (1859): Mineralogisches Lexicon für das Kaiserthum Österreich. I. Band. Wilhelm Braumüller, Wien.
Koch, A. (1885): Erdély ásványainak kritikai átnézete [Critical review of the minerals of Transylvania]. Orvos-Természettud. Társulat, Kolozsvár (in Hungarian).
Primics, G. (1886): Das Vorkommen der derben Quarzvarietäten bei Tekerő. Földtani Közlöny, 16, 347-353.
Mârza, I. (1999): Câmpul gemologic Techereu [The Techereu gemological field]. Studia Universitatis Babeş-Bolyai, Geologia, 44/1, 57-66 (in Romanian with English abstract).
Mârza, I., Constantina, C., Fodor, Ş. & Bodnariuc, A. (1999): Mineralogical and gemological considerations about silicolites in association with Paleogene rhyolites from Techereu (Apuseni Mountains). Studia Universitatis Babeş-Bolyai, Geologia, 44/1, 119-128.
Koch, A. (1885): Erdély ásványainak kritikai átnézete [Critical review of the minerals of Transylvania]. Orvos-Természettud. Társulat, Kolozsvár (in Hungarian).
Primics, G. (1886): Das Vorkommen der derben Quarzvarietäten bei Tekerő. Földtani Közlöny, 16, 347-353.
Mârza, I. (1999): Câmpul gemologic Techereu [The Techereu gemological field]. Studia Universitatis Babeş-Bolyai, Geologia, 44/1, 57-66 (in Romanian with English abstract).
Mârza, I., Constantina, C., Fodor, Ş. & Bodnariuc, A. (1999): Mineralogical and gemological considerations about silicolites in association with Paleogene rhyolites from Techereu (Apuseni Mountains). Studia Universitatis Babeş-Bolyai, Geologia, 44/1, 119-128.
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