 | | Journal (article/letter/editorial) | | Review Mineralogy, Geochemistry and Genesis of Agate—A Review Jens Götze 1, *, Robert Möckel 2 and Yuanming...Bergakademie Freiberg, Brennhausgasse 14, 09599 Freiberg, Germany Helmholtz-Zentrum Dresden-Rossendorf, Hemholtz...Technology, Chemnitzer Str. 40, 09599 Freiberg, Germany; r.moeckel@hzdr.de Department of Geological Sciences...20 November 2020 Abstract: Agate—a spectacular form of SiO2 and a famous gemstone—is...interstitial molecular H2 O and silanol groups. Most agate occurrences worldwide are related to SiO2 -rich (rhyolites |  | Pršek, Jaroslav, Dumańska-Słowik, Magdalena, Powolny, Tomasz, Natkaniec-Nowak, Lucyna, Toboła, Tomasz, Zych, Damian, Skrepnicka, Dominika (2020) Agates from Western Atlas (Morocco)—Constraints from Mineralogical and Microtextural Characteristics. Minerals, 10 (2) 198 doi:10.3390/min10020198 | Journal (article/letter/editorial) | | 22 February 2020 Abstract: Agate samples collected from the vicinity of Asni and...contains numerous solid inclusions of hematite, celadonite, as well as poorly-organized carbonaceous material...worldwide occurrences and numerous published papers, there are still some problems concerning agate nomenclature...completely solved. From a textural point of view, agate represents a banded chalcedony, which incorporates...mineralogical/petrographical approach assumes that agate can be considered as a rock that consists mainly |  | | Book | | Yuanming Pan Mineralogy, Geochemistry and Genesis of Agate—A Review Reprinted from: Minerals 2020, 10, 1037.... . . . . 5 Terry Moxon and Galina Palyanova Agate Genesis: A Continuing Enigma Reprinted from: Minerals...Gemological Characteristics and Origin of the Zhanguohong Agate from Beipiao, Liaoning Province, China: A Combined...source of the silica required for the growth of agate remains largely unknown. The first known descriptive...exists today. The complex, multi-step process of agate formation is not yet completely understood. The |  | | | | Front cover top Agate from Germany; bottom Agate from Scotland. Back cover Agate from Germany. Title page...page Agate from Russian Arctic coast. Distribution NBN International Estover Road Devon PL6 7PY UK Contents... Contents Introduction Names of agates What is an agate? Properties of agates Sources of agates Europe...different geological environments. Since the mid-1900s, agate collecting has become very popular in Europe, North...America and the Middle East. There are thousands of agate-producing areas on Earth, and in the following pages |  | | Book | | Front cover top Agate from Germany: bottom Agate from Scotland. Back cover Agate from Germany. Title page...page Agate from Russian Arctic coast. Distribution NBN International Estover Road Devon PL6 ?PY UK Contents...Introduction 4 Names of agates 6 What is an agate? 10 Properties of agates 44 Sources of agates...geological environments. Si nce the mid-1900s, agate collecting has become very popular in Europe, North...America and the M iddle East. There are thousands of agate-producing areas on Earth, and in the following pages |  | | Journal (issue) | | 2014 Cover Image: “Saturn’s Rings” Inclusions in Agate Photo and Collection of Tom Shearer 3 Agates and...Göetze, Mineralogist TU Bergakademie Freiberg, Germany Introduction Agates are some of the most fascinating...ancient times, the question concerning the genesis of agate is still in discussion today. Both in historic and...a lot of data about certain agate occurrences or specific aspects of agate formation have been published...genesis of agates. 7 The results document that agate formation is a very complex and often a multi-step |  | | Report (issue) | | deposits Occurrences east of Sudbury Falcon Mine Wanup quarry Elizabeth Mine Wahnapitei occurrences MacDonald...MacDonald occurrence Page occurrence Warren quarry Occurrences along Highway 86 Wanapitei Lake quarry Vermilion...of Sudbury High Falls Road occurrences Espanola-Manitoulin Island occurrences Brazil Lake occcurrence St...Mine Pater Mine Pronto Mine Jasper conglomerate occurrences, Highway 546 Glagoma Mine Cheney Mine Gould Mine...copper mines Stobie Mine Jasper conglomerate occurrences Jardun Mine v 55 55 57 58 58 61 61 62 62 64 |  | | Book | | Lavra da Pederneira 526 District of Santa Rosa, Francisc6f olis 534 District o Golconda, Governador Valadares...539 District of Coronel Murra, Rubelita, Salinas, Virgem da Lapa, Ara(uaf and ltinga 554 District o Conselheiro...colors of agate 669 The discovery of agate in Brazil 674 The genesis of agate 676 "Thematic" agate 678 "Polygonal"..."Polygonal" agate 679 Jasper 680 Silicified wood 683 The magic of the opal 684 The precious opal of Pedro...sedimentary basins: geodes of amethyst quartz, agate, zeolites, apophyllite, silicified anhydrite, gypsum |  | | Book | | Doctor's degree from the University of Heidelberg, Germany (1972). He is a Member of the Romanian Academy...Geological Outlook Genetic Types of Mineral Occurrences References 15 20 28 Mineralogical Regions Czech...crystal; xx = crystals; coll. = collection. Quartz, agate. (5.5 cm sp.), Erdőhorváti; PC [SG] SYMBOLS FOR...mineral species, and their prime or significant occurrences, are given for each of the 1.000 mineral species...Budapest), for critical comments about mineral occurrences. Tímea Szabó (Herman Ottó Mu seum), for compilation | | | Book | | xx = cry tals; coll. = collection. Q11ar1::., agate, (5.5 cm sp.). Erdoho1wi1i: PC {SGJ S Y ~I l3...mineral species. and their prime or significant occurrences. are given for each of 1he 1.000 mineral species...Budapest). for critical comments about mineral occurrences. Timea Szab6 (Herman Ott6 Mueum). for compilation...host different types of mineral deposits, or occurrences, as a function of their relationship to the primary...epigenetic overprints. The most significant mineral occurrences in the West Carpathians include: iron sulphides |  | | Book | | MB/ are a series of maps to give the mineral occurrences both a spatial and geological context, and some..."British" species. A further 11 British first occurrences have since been recorded from specimens held...Bergemann in 1858 from Johanngcorgenstadt, Saxony, Germany, and named by G. J. Adams in 1869. They were considered...species to his increasing list of British first occurrences. What went unnoticed at the time was that the...work (as chief collaborator on Kingsbury's Lake District "discoveries") is most affected by the problem |  | | Book (volume) | | various places, especially in regard to diamond occurrences which promise to make the North American continent...tromelndonesian 186 Figure 34. Map of nephrite jade occurrences from Alaska to California... cesses 189 Figure...orenstecees 217 Figure 45. Map of jadeite occurrences in the Motagua River valley, Guatemala.........Amethyst Mine......... 312 Figure 66. Collecting agate nodules along shore of Lake Superior... cece 316...geology of ‘Texas showing zone of petrified wood occurrences ............. 355 Figure 77. Comical 1834esketch | | | Book (volume) | | various places, especially in regard to diamond occurrences which pro1nise to make the North American continent........ 186 Figure 34. Map of nephrite jade occurrences frorn Alaska to California.......................... 189 Figure 35. Map of nephrite jade occurrences in Wyoming................................................ 217 Figure 45. Map of jadeite occurrences in the Motagua River valley, Guatemala.........Amethyst Mine......... 312 Figure 66. Collecting agate nodules along shore of Lake Superior........... |  | | Report (edition) | | and expanded to include additional occurrences of emerald, opal, agate, chalcedony, organic gems, tiger............................... 47 Other beryl occurrences.......................................................................................... 127 Agate, onyx, and carnelian.................................................... 127 Formation of banded agate............................................................................................. 128 Agate in Western Australia........................... |  | | Book | | Mitscherlich, Plattner, Ko bell, and Wenzel in Germany; Lavoisier, Vauquelin, Cordier, Dufrenoy, Beudant...Weiss, Neumann, Naumann, Hessel, and Frankenheimin Germany; Koksharov, Eremeyev, and Gadolin in Russia; Wollaston...Italy), boric acid exhalations (Tuscany), and agate occurrences, the volcanogenic products are as a rule of...copper, on the Keweenaw Peninsula, Lake Superior district, where masses weighing about 400 tons have been...adularia, and other minerals. Other well-known occurrences of native copper are at Montecatini in Italy |
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