| Mineralogy, TU Bergakademie Freiberg, Brennhausgasse 14, D-09596 Freiberg, Germany Department of Earth and...Albuquerque, NM 87131, Germany Received 8 January 2000; accepted 5 July 2000 Abstract Agate samples of acidic...analysis to provide information about the process of agate formation and the origin of mineral-forming fluids...of different localities but also within single agate samples Žup to 10‰ for d18 O.. In general, oxygen...quartz incrustations. Variations within single agate samples can be explained either by kinetic effects |
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Götze, J., Plötze, M., Fuchs, H., Habermann, D. (1999) Defect structure and luminescence behaviour of agate — results of electron paramagnetic resonance (EPR) and cathodoluminescence (CL) studies. Mineralogical Magazine, 63 (2) 149-163 doi:10.1180/002646199548394 |
Journal (article/letter/editorial) |
| Defect structure and luminescence behaviour of agate resultsof electron paramagnetic resonance (EPR)...of Mineralogy, Freiberg University of Mining and Technology, D-09596 Freiberg, Germany 2 Department of...Ruhr-University Bochum, D-44780 Bochum, Germany ABSTRACT ] I Samples of agate and quartz incrustations from...investigated by EPR, CL and trace element analysis. In all agate samples the following paramagnetic centres were...in quartz of the parent volcanics, are absent in agate. Generally, the abundance of 03 centres (silicon |
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Götze, Jens, Möckel, Robert, Pan, Yuanming (2020) Mineralogy, Geochemistry and Genesis of Agate—A Review. Minerals, 10 (11) 1037 doi:10.3390/min10111037 |
Journal (article/letter/editorial) |
| Review Mineralogy, Geochemistry and Genesis of _Agate_—A Review Jens Götze 1, *, Robert Möckel 2 and Yuanming...Mineralogy, TU Bergakademie Freiberg, Brennhausgasse 14, 09599 Freiberg, Germany Helmholtz-Zentrum Dresden-Rossendorf...Hemholtz Institute Freiberg for Resource Technology, Chemnitzer Str. 40, 09599 Freiberg, Germany; r.moeckel@hzdr...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 |
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Götze, J., Plötze, M., Tichomirowa, M., Fuchs, H., Pilot, J. (2001) Aluminium in quartz as an indicator of the temperature of formation of agate. Mineralogical Magazine, 65 (3) 407-413 doi:10.1180/002646101300119484 |
Journal (article/letter/editorial) |
| an indicator of the temperature of formation of agate J. GÖTZE*, M. PLÖTZE{, M. TICHOMIROWA, H. FUCHS...PILOT TU Bergakademie Freiberg, Institute of Mineralogy, D-09596 Freiberg, Germany ABSTR ACT An ‘Al-thermometer’...applied to agate samples of volcanic parent rocks to provide information about the temperature of agate formation...resonance (EPR) measurements. The calculations for agate bands in some cases yield temperatures of up to...for associated quartz incrustations within the agate geodes are in good accord with those calculated |
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Palyanova, Galina - Ed. (2021) Agates: Types, Mineralogy, Deposits, Host Rocks, Ages and Genesis. MDPI. doi:10.3390/books978-3-0365-2184-8 |
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 |
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Götze, Jens, Gaft, Michael, Möckel, Robert (2015) Uranium and uranyl luminescence in agate/chalcedony. Mineralogical Magazine, 79 (4) 985-995 doi:10.1180/minmag.2015.079.4.08 |
Journal (article/letter/editorial) |
| pp. 985–995 Uranium and uranyl luminescence in agate/chalcedony JENS GÖTZE1,*,{, MICHAEL GAFT2 1 2 3...Bergakademie Freiberg, Institute of Mineralogy, Brennhausgasse 14, 09596 Freiberg, Germany The Open University...Institute Freiberg for Resource Technology, Halsbrücker Str. 34, 09599 Freiberg, Germany [Received 7...spectrometry show that the distribution of U within the agate samples is heterogeneous and coincides with the...The results indicate that U is incorporated into agate as uranyl ions. These ions, which are bound to the |
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Richter-Feig, Julia, Möckel, Robert, Götze, Jens, Heide, Gerhard (2018) Investigation of Fluids in Macrocrystalline and Microcrystalline Quartz in Agate Using Thermogravimetry-Mass-Spectrometry. Minerals, 8 (2) 72 doi:10.3390/min8020072 |
Journal (article/letter/editorial) |
| Macrocrystalline and Microcrystalline Quartz in Agate Using Thermogravimetry-Mass-Spectrometry Julia Richter-Feig...Bergakademie Freiberg, Institute of Mineralogy, Brennhausgasse 14, 09596 Freiberg, Germany; richterjulia1989@gmail...Helmoltz Institute Freiberg for Resource Technology, Chemnitzer Str. 40, 09599 Freiberg, Germany; r.moeckel@hzdr...macrocrystalline quartz from twelve agate samples were investigated, from Germany (Schlottwitz, St. Egidien, Chemnitz...found. The results indicate a silica source for the agate formation from aqueous solutions but also a possible |
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(1899) Catalogue and Price List of Minerals. Roy Hopping |
Catalog/List |
| are scarcer. instances, material, Pater- at quarry received the entire we in- or through the...Von 2O to be Thaumasite the he and dis- quarry, West aggregate of pris- matic uals crystals...variety crystallized specimens the most beautiful quarry crystals, APOPHYLLITE to of productive period...loosely so or flat, set Burger’s crystals on quarry short are The edge. are and pearly striated...large to the Hoxsey’s in 15c., 20c., and quarry distinct curved many Small fine cabinet Large |
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(2019) Mineralogical Almanac Vol. 24 (3) |
Journal (issue) |
| by Andreas Massanek and Anna Dziwetzki from the Freiberg Bergakademie is dedicated to a special exhibition...Saxon minerals in the Terra Mineralia Museum (Germany). A group of Italian mineralogists presents a new..."Unique Discoveries from Saxony" Special Exposition at the Terra Mineralia in Freiberg 8 Jaroslav Hyrsl Erzgebirge...Fluorite (with old labels). 7 x 5 cm. Schwarzwald, Germany. GM KFU #7461. 15-16. (on page 10). 15. Set of...listed as Siberian), two from Brazil, and three from Saxony. The register also lists nine sapphires, twelve |
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(2014) Mindat.org Show Special Denver 2014. Mindat.org Show Special 2. mindat.org |
Journal (issue) |
| Page 7 By Prof. Jens Göetze TU Bergakademie Freiberg Page 19 25 Page Page 33 Page 35 Find your...2014 Cover Image: “Saturn’s Rings” Inclusions in Agate Photo and Collection of Tom Shearer 3 Agates and...included a long hard walk to the Amboarohy corundum quarry. Amboarohy is the famous locality for sapphire...Jens Göetze, Mineralogist TU Bergakademie Freiberg, Germany Introduction Agates are some of the most...ancient times, the question concerning the genesis of agate is still in discussion today. Both in historic and |
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(2022) Mineralogical Almanac Vol. 27 (1) |
Journal (issue) |
| Carl Freiesleben was born on June 14, 1774 in Freiberg (Saxony) in the family ofa miner. He already gained...the gymnasium. In 1790-1792, he studied in the Freiberg Mining kademy, where Abraham Gottlob 1. Johann...University wrote, remembering years of study in the Freiberg Mining kademy: "The family of Freiesleben accepted...Frcic'> leben ~tudied the geology and mineralogy of Saxony and Thuringia in his first big trip with Leopold...the first mentions of mining activities in Saxony near Freiberg date back to 1168, ore mining in Annaberg |
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Götze, Jens, Möckel, Robert, Vennemann, Torsten, Müller, Axel (2016) Origin and geochemistry of agates in Permian volcanic rocks of the Sub-Erzgebirge basin, Saxony (Germany) Chemical Geology, 428. 77-91 doi:10.1016/j.chemgeo.2016.02.023 |
Journal (article/letter/editorial) |
| volcanic rocks of the subErzgebirge basin, Saxony (Germany) Jens Götze, Robert Möckel, Torsten Vennemann...volcanic rocks of the sub-Erzgebirge basin, Saxony (Germany), Chemical Geology (2016), doi: 10.1016/j.chemgeo... PT Sub-Erzgebirge basin, Saxony (Germany) a TU Bergakademie Freiberg, Institute for Mineralogy, Brennhausgasse...Brennhausgasse 14, 09596 Freiberg, Germany Institut de Minéralogie et Géochimie, Université de Lausanne...Helmholtz Institute Freiberg for Resource Technology, Halsbrücker Str. 34, 09599 Freiberg, Germany TE b SC |
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(2009) Index 2009: Volume 84. Rocks & Minerals, 85 (1) 79-87 doi:10.1080/00357520903458186 |
Journal (article/letter/editorial) |
| Actinolite, New York, 221, 454 Adularia, Michigan, 39 Agate, 160–65 Albert Laws Kidwell (1919–2008), A. E. Smith...Natural (and Not-SoNatural) History of “Turritella Agate,” 160–65 Almandine, New York, 222–24 Alamandine... Kothapalli, S. C. Vogel, 54–61 Chips from the Quarry, M. E. Huizing, 5–9, 101–3, 197–201, 293–95, 389–91...Fabulous New Mineral Exhibit Opens in Freiberg, Saxony, Germany, 128–34 Francis, C. A., see Collector’s...L. Leicht, 183 Georgia, Tellus Museum, 122–27 Germany, Schloss Freudenstein terra mineralia Museum, 128–34 |
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(2003) One Off Pieces. Richard Tayler Minerals Catalogue 92. Richard Tayler Minerals |
Catalog/List |
| Landsverk Quarry, Evje South Nonvaf;·-- --• An unusual colour for this mineral, £15 AGATE, blue lace...crystalline mass in calcite about lxl inch Freiberg Saxony Germany £25 AXINITE small brown crystals in an...2x2 I believe this is the mine rather than the quarry itself. £6 CELESTITE dark grey fibrous mass 2xl...coating on quartz Borstein Reichenbach Odenwald Germany lz2cm £8 GOETHITE good small display piece of reddish-brown...brmvn fibrous vein section on the edge. Merehead Quarry, Mendips Somerset 2x2.5 £5 GOLD several small spots |
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(2012, April) The Agateer Vol. 11 (4) Madison Gem and Mineral Club |
Journal (issue) |
| discoveries came from Jerry’s work in 1983 in a limestone quarry in Waukesha, from which he collected fourteen previously...a native of Thuringia (Germany) studied mineralogy and geochemistry at Freiberg University of Mining and...Technical University Bergakademie in Freiberg, Saxony (Germany). Maybe it was the mole people. Dr.... Götze is a life long mineral collector and agate enthusiast. As he worked on his doctoral thesis, he...silica minerals, including agates. His work on agate formation includes numerous articles and a growing |
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Moxon, Terry, Palyanova, Galina (2020) Agate Genesis: A Continuing Enigma. Minerals, 10 (11) 953 doi:10.3390/min10110953 |
Journal (article/letter/editorial) |
| minerals Review Agate Genesis: A Continuing Enigma Terry Moxon 1 and Galina Palyanova 2,3, * 1 2 3 ...discussions based on observations on host rock and agate thick sections. Over the next 25 years, experimental...identifying the physical and chemical properties of agate. The outcome of this work has allowed limited evidence-based...evidence-based comment on the conditions of agate formation. There is a general consensus that agates...Keywords: agate; chalcedony; XRD; genesis; moganite; crystallite growth; age 1. Introduction Agate and chalcedony |
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Schmeisser, Johann Gottfried (1795) A System of Mineralogy formed Chiefly on the Plan of Cronstedt Vol. 1. C. Dilly, London. |
Book (volume) |
| 114 Spec. 2 1 Heliotrop - 1 1 - 1 . - - Agate, or Achates Spec. 22. fa/per. Jafpis - - -... 23. Siliceous Spec. 24. Obfidian , Iceland Agate Spec. 25. Variolit Spec. 26. Feldjpar Var....and value. lefs glajs flint the Ealt ;n. Saxony, in of oxyd of cobalt , grains come from quantity...fine yellow tranfparent amber, and thofe from Saxony yellowiftf white. The Eaft Indian borax, and...Some and Peru. are foqnd in England, Italy, Germany, Hungary, Bretagne, &c. The brown kind, Rome dc |
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(1996) World of Stones 9. "Plus" Ltd. Publishing |
Journal (issue) |
| Cover З A "Florentine Mosaic" The Top of Tab1e. Agate, jasper, lazuгite. Firm "PLUS-. 9"production. Photo:...Karslve!! 5. Khyr-Ptlуаki б. Nauchпyi 7. Pervamarskil Quarry 8. Baklа Mountain 9. Klzilovka (former Karagºch)...Ravine 12. Petropºvlovskii Quarry 13. Lozovskoi Quarry 14. B1yuk-Yankoiskii Quarry 15. Ауи-Dag mountain 16...Lysaya Mountain 27. Maifovka Lake 28. Gornostaevskli Quarry and su(fur occurrence 29. Chekur-Koyash sulfur...CRIMEA Datolite — in the now derelict broken-stone quarry situated on the hill usually known as Andezitovaya |
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Rakovan, Monica T. (2018) Crystal Days: From Lwówek Śląski to Lubań—International Mindat Conference. Rocks & Minerals, 93 (2) 164-171 doi:10.1080/00357529.2018.1405222 |
Journal (article/letter/editorial) |
| 2. Map of southwest Poland at its border with Germany and the Czech Republic. Lwówek Śląski and Lubań...United States, Canada, United Kingdom, Poland, Germany, Spain, and Hong Kong. Leslie Gordon photo. emony... and mineral museums (including those in Freiberg, Germany) and sightseeing in the cities of Wrocław...Werner), which houses the Geoscience Museum of the Freiberg University of Mining and Technology (TU Bergakademie)...the three world-class mineral museums in Freiberg, Germany, by their curator, Andreas Massanek: the Terra |
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Pan, Yuanming, Li, Dien, Feng, Renfei, Wiens, Eli, Chen, Ning, Chernikov, Roman, Götze, Jens, Lin, Jinru (2021) Uranyl binding mechanism in microcrystalline silicas: A potential missing link for uranium mineralization by direct uranyl co-precipitation and environmental implications. Geochimica et Cosmochimica Acta, 292. 518-531 doi:10.1016/j.gca.2020.10.017 |
Journal (article/letter/editorial) |
| Bergakademie Freiberg, Institute of Mineralogy, Brennhausgasse 14, 09599 Freiberg, Germany e Key Laboratory...In this contribution, microcrystalline silicas (agate and opal-CT) containing 27–137 ppm U have been investigated...and (B) as-is and (C) UV-luminescence colors of _Agate_-1, note the presence of quartz crystals in the center...divided into two sub-samples (Opal-2b and Opal-2w). _Agate_-1 from the Dryhead area, Montana, USA (Fig. 1B and...sandstones (Götze et al., 2009). _Agate_-2 from St Egidien, Saxony, Germany, occurs in Permian volcanic tuffs |
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| by Franckh’sche Verlagshandlung, Stuttgart, W. Germany. Adapted by Anthony C. Tennissen. Revised Edition...in igneous and contact metasomatic deposits. In Germany, found as nicely shaped crystals at Neudorf, Harz...Idaho, and Tintic, Utah. Beautiful crystals in Saxony, Germany. Massive crystals at Broken Hill, New South...Valley area. Nice crystals at Sieger, Westphal, Germany; at KladnoRodna, Czechoslovakia. Very unusual but...Botes, Rumania, and at Pribram, Czechoslovakia. In Germany, very excellent crystals at several places in Harz |
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Tennissen, Anthony C. (1973) Colorful Mineral Identifier (2nd ed.) Sterling Publishing Co., Inc. |
Book (edition) |
| Lieber, © 1969 by Verlagshandlung, Stuttgart, W. Germany. Anthony C. Tennissen. der schénen* Franckh’sche...hydrothermal deposits. Occasionally in igneous Germany, Harz Mts.; and contact metasomatic deposits...Idaho, and Tintic, Utah. Beautiful crystals in Saxony, Germany. Massive crystals at Broken Hill, New South...Valley area. Nice crystals at Sieger, Westphal, Germany; at KladnoRodna, Czechoslovakia. Very unusual but...Botés, Rumania, and at Pribram, Czechoslovakia. In Germany, very excellent crystals at several places in Harz |
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(1965) R & M Junior Club. Rocks & Minerals, 40 (2) 138-139 doi:10.1080/00357529.1965.11767473 |
Journal (article/letter/editorial) |
| & M JUNIOR CLUB Collecting In Idar-Oberstein, Germany Since few rock and mineral collectors from the...chance to visit the world famous Idar-Oberstein, Germany, area, I'd like to tell of my 7 visits there. My...to be stationed on an army post in Landsthul, Germany (approx. 40 miles from Idar-Oberstein). At that...San Francisco, Calif. While going to school in Germany (1960) my 6th grade class was trying to find a...through Idar-Oberstein. While there I searched for agate and any other mineral I could find. Digging up small |
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(1986, October) List. 3. J. Stobbe |
Catalog/List |
| x 42 . ANKERITE pseudo after CALCITE xx - Freiberg, Saxony, F.ast- Gennany. Large bra,m tenninated...4. 15 15,00 1 4. l\RGENTITE xx - Schlerna, Saxony' East-Ge:rrnany. Very u.--iusual tenni.'lated intergro...showy .. 85 x 51 .x 34 CAI.CITE xx - Stoneyccmbe Quarry, Kingskerswell, Cornwall, England. Intergra,m reddish...Dfl PYROMORPHITE xx - Kransberg, Hessen, West-Germany. A nice old-timer. Medium green terminated intergrown...QUARTZ - AGATE - Lathum, Gelderland, Holland. A cut and one side polished slice with vivid red agate. From |
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(1956) World News on Mineral Occurrences. Rocks & Minerals, 31 (3) 131-141 doi:10.1080/00357529.1956.11767658 |
Journal (article/letter/editorial) |
| of Mines, I heard of an active uranium mine or quarry a couple of miles from town. Following the highway...pollucite which I discovered at the Strickland Quarry, in Portland, during 1954. "Several institutions...proved to be fairly abundant in one section of the quarry wall, intergrown with lepidolite, spodumene, pink...known from the Bolton Schist at the Strickland quarry, should also have appeared in the .list In my map...contact between pegmatite and schist at the Slocum quarry, in East Hampton, is evidently wollastonite. Optical |
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