 | | Journal (issue) | | Alluvial gold occurences 67 7. Gold from occurrences across the world in Brad Gold Museum 68 Characterization...and engineering staff, many of them educated in Germany. The collection has been added with new gold specimens...mineral samples from various Romanian and foreign occurrences, arranged in systematic order. The four rooms...Heidelberg â Germany. Numerous samples illustrate a variety of assemblages between native gold and quartz, calcite...tellurides have been described for the first time in occurrences from the Metaliferi Mts. The nomenclature of |  | | Book | | natural, cultured and imitation Alexander E. Fam Quartz Michael O'Donoghue In preparation Amber H. Fraquet...Darragh Topaz D. B. Hoover Butterworths Gem Books Quartz Michael O'Donoghue Butterworths London Boston...O'Donoghue, Michael Quanz.-(Butterworths gem books) I. Quartz I. Title 553.8'7 QE391.Q2 ISBN 0-408-01462-8 Library...O'Donoghue, Michael Quartz (Bunerworths gem books) Bibliography: p. Includes indexes. 1. Quartz. I. Title. II... Preface Even without its gemstone application, quartz is a formidable mineral to survey in a book of |  | | Book | | Mineralogy of Quartz and Silica Minerals Edited by Jens Götze Printed Edition of the Special Issue Published...com/journal/minerals Mineralogy of Quartz and Silica Minerals Mineralogy of Quartz and Silica Minerals Special...Institut fuÌr Mineralogie, TU Bergakademie Freiberg Germany Editorial OfïŹce MDPI St. Alban-Anlage 66 4052... . . . . . . . . vii Preface to âMineralogy of Quartz and Silica Mineralsâ . . . . . . . . . . . . ....GoÌtze Editorial for Special Issue âMineralogy of Quartz and Silica Mineralsâ Reprinted from: Minerals 2018 |  | | Book | | Mineralogy of Quartz and Silica Minerals Edited by Jens Götze Printed Edition of the Special Issue Published...com/journal/minerals Mineralogy of Quartz and Silica Minerals Mineralogy of Quartz and Silica Minerals Special...Institut fuÌr Mineralogie, TU Bergakademie Freiberg Germany Editorial OfïŹce MDPI St. Alban-Anlage 66 4052... . . . . . . . . vii Preface to âMineralogy of Quartz and Silica Mineralsâ . . . . . . . . . . . . ....GoÌtze Editorial for Special Issue âMineralogy of Quartz and Silica Mineralsâ Reprinted from: Minerals 2018 |  | Götze, Jens, Pan, Yuanming, Stevens-Kalceff, Marion, Kempe, Ulf, MĂŒller, Axel (2015) Origin and significance of the yellow cathodoluminescence (CL) of quartz. American Mineralogist, 100 (7) 1469-1482 doi:10.2138/am-2015-5072 | Journal (article/letter/editorial) | | significance of the yellow cathodoluminescence (CL) of quartz Jens Götze1,*, Yuanming Pan2, Marion Stevens-Kalceff3...Bergakademie Freiberg, Brennhausgasse 14, 09596 Freiberg, Germany Department of Geological Sciences, University of...The origin of yellow cathodoluminescence (CL) in quartz has been investigated by a combination of CL microscopy...oxygen deficiency and local structural disorder in quartz. A proposed luminescence center model implies self-trapped...(STE) emission from localized amorphized regions in quartz. Although the high-intensity emission at 570 nm |  | | Journal (article/letter/editorial) | | Figure 1. Pair of quartz crystal rosettes (the largest is 2.5 cm across), from the Battle River area...University] at 17:11 21 December 2014 Unusual Quartz All photos by Michael A. Menzies of specimens...specimens in his collection, except as noted and Chalcedony Pseudomorphs From CANADAâS Alberta Badlands Figure...collecting by local rock and gem clubs, these occurrences are still less well known than are the fossils...bones lined with quartz crystals; Sabina (1978) notes the occurrence of pseudocubic quartz; and Mussieux |  | | Journal (article/letter/editorial) | | amazonite, the many varieties and associations of quartz found throughout the state rank it as one of the...for about 750 known mineral species.* Of these, quartz is one of the most desirable from a collector's...100-Year Record (Eckel, 1961). 374 ROCKS & MINERALS Quartz was a familiar gemstone to many early Colorado...list of Colorado mineral localities (in cluding quartz) was included in Hollister's The Mines of Colorado...Publica tions summarizing Colorado mineral occurrences were writ ten by Eckel (1961), whose monumental |  | | Journal (article/letter/editorial) | | homepage: http://www.tandfonline.com/loi/tigr20 âIcyâ quartz from the Itmurunda deposit (Northern Balkhash area)...V. G. Balakirev & I. V. Kovalenko (1981) âIcyâ quartz from the Itmurunda deposit (Northern Balkhash area)...Library] Date: 21 June 2016, At: 11:00 "Icy" quartz from the ltmurunda deposit (Northern Balkhash...with areas saturated by dark-colored amphibole and quartz. It is distinguished by a distinct banded structure...a l l lumps of jadeitites. Monomineral occurrences of quartz are bands 5-6 c m thick, situated between |  | | Journal (issue) | | specimens the authors have examined were colourless quartz crystals with man-made 'threephase' inclusions...what appeared to be a mixture of epoxy resin and quartz fragments (Koivula and Kammerling, 1989). In 1986...1991, 22, 8 the epoxy and not of the underlying chalcedony. In the authors' experience, this reading is...Electrically Gems& & Gemology, 22, 4, 246. Treated Chalcedony. Gems Nassau, K., 1983. Gemstone Enhancement...pania turemali, penni tourmalin; rod turmalin. "A quartz inclining to a red colour". As with other colours |  | | Book | | com/series/10172 Jens Götze Robert Möckel âą Editors Quartz: Deposits, Mineralogy and Analytics 123 Editors...of Mineralogy Brennhausgasse 14 09596 Freiberg Germany ISBN 978-3-642-22160-6 DOI 10.1007/978-3-642-22161-3...of Mineralogy Brennhausgasse 14 09596 Freiberg Germany ISBN 978-3-642-22161-3 (electronic) Springer...raw materialsââ held in June 2011 in Freiberg, Germany. The 15 chapters are written by international experts...and reflect the state of the art in the field of quartz and silica raw materials. The book covers the broad |  | | Journal (article/letter/editorial) | | ooze) + opal-CT (~rcelanite) -+ chalcedony or cryptocrystalline quartz (chert). A solution-r~eposition...opal-CT predominates, while in carbonate sediments quartz is most common. Experiments at 25 and 150°C over...precipitation at ordinary temperatures and transforms to chalcedony and/or microcrystalline pressures is biochemical...biochemical. SEVER (1962) suggested that quartz, the stable silica phase in diagenetic environeven in the late...opal-a (JONES (porcelanite) --+ chalcedony or cryptocrystalline quartz and SEGNIT,1971). and the term |  | | Book (volume) | | various places, especially in regard to diamond occurrences which promise to make the North American continent...Geology, Missoula, MT; Carl Scott, Scottâs Red Rose Quartz, Custer, SD; Sharon Skalko, The Amber Co., North...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.........sccsssssscnessessserssesnseees 225 Figure 47. âLeoparditeâ quartz porphyry from Mecklenburg County, NC... 229 Figure |  | | Book | | pay economic TWELVE APOSTLES Jasper Sapphire Chalcedony Peter Andrew James homage to the twelve birthstones...endowed with âcelestial virtues.â This silver and quartz. was still in keeping with the popular feeling...apply critical Gottlob Werner, of Freiberg, in Saxony, pubÂŹ judgment to the mineral kingdom. He adopted...the qualifying characteristics: of look-alike quartz and topaz differ greatly. brilliance, beauty,...interesting study. stone crystals, except for quartz, seldom are found in large sizes. 40 Light Characteristics |  | | Book | | and rivers f o r epidote, unakite, blue quartz, agate, chalcedony, petrified wood and other gemstones. Photograph...deposits have come to light in Alabama and Tennessee. Quartz gems have been discovered in Florida and Mississippi...sapphires, garnets, amazonite, amethyst, smoky quartz, rose quartz, williamsite and other gems at fee sites...dimension stone quarries, inactive gold mines, quartz out crops, and a wealth of other clues the well...Raritan and Delaware Rivers. It is said similar occurrences are found in Nova Scotia, Ice land and India |  | | Book | | by Dimitri lvanowitsch morethantwicethesizeof Germany but, Mendelejew,and it validated the rulesof with...SouthwestafricanMemories". He later returned to Germany,where he was appointed to chair the Upper Mining...the TechnischeUniversitat BergakademieFreiberg,Germany 25 ANGOLA -·-·-·+·-·-·-· :-· ·-·- âąâąâąâąâąâąâąâąâąâąâąÂ·Â·Â·Â·...KleineSpitzkoppe,which C.Hintze described,were brought to Germany by GOrich. He was also the author of the first...beingthefirstEuropean specimensfrom German South West Africa to Germany, including Topaz from the tain in Bethanien, fortheacquisition |  | | Journal (article/letter/editorial) | | Identification of quartz and carbonate minerals across northern Nevada using ASTER thermal infrared emissivity...and cost-effective identification and mapping of quartz and carbonate minerals at regional to local scales...materials, many of which are composed primarily of quartz and carbonate minerals. This area is also endowed...deposits frequently deposited large amounts of quartz where fluids cool, and generally smaller amounts...dolomite by other mechanisms. To identify and map quartz and carbonate minerals, band ratioing techniques |  | | Report (issue) | | TOURMALINE 64 ---------------- QUARTZ 71 -------------- CHALCEDONY 74 -------------- CHRYSOPRASE...Pebble 22. Kunzite from Beach, from exposed Quartz crystals, end Mesa Grande of Entrance to 25...Los Angeles County Moonstone 27. on of Bose Quartz. 21. 26. the showing east, Mine-near Mountain...County, Lepidolite 18. 23. crystals Mine, Quartz crystals 20. of looking at Pala Rubellite...aidthe collec- gems âas itself âhave been Germany, United States in one State, worldâthe first | | | Book (volume) | | various places, especially in regard to diamond occurrences which pro1nise to make the North American continent...Geology, Missoula, MT; Carl Scott, Scott's Red Rose Quartz, Custer, SD; Sharon Skalko, The Amber Co., North........ 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...... |  | | Journal (article/letter/editorial) | | determinations made of the stable oxygen isotope content of quartz, hematite, and calcite from the Chub Lake prospect...Ocean Water (VSMOW). We conclude that these occurrences formed from groundwaters at a temperature of...of bladed specular hematite and Cumberland-habit quartz are the most common minerals found. Noteworthy...deposits of crystallized specular hematite and quartz were discovered in the Adirondack Lowlands, but...The most common speciesâcalcite, hematite, and quartzâwere easily sight-identified when crystallized |  | | Journal (issue) | | tremolite-chlorite schists, hornblende schists, phyllites and quartz-mica schists. Specific higher-temperature exceptions... and (2) alkali feldspar + talc = phlogopite + quartz, while the appearance of biotite instead of, or...present in the adjacent pegmatite. The emerald occurrences In May 1957 (Bohmke, 1982) the renowned Sandawana... Since then a number of other minor emerald occurrences have been discovered within the southern part...pegmatites, aplites, quartz-feldspar quartz-feldspar and feldspar veins and quartz stringers have intruded |  | | Journal (issue) | | crystals $3,500 - Calaveras County, Calif. GOLD on Quartzâ$1,400 Crystal Mine, Angels Camp, Calif. GOLDâ1...crystals $3,200 - Ma dera County, Calif. GOLD on Quartzâ$2,750 Crystal Mine, Angels Camp, Calif. KRISTALLE...Lieber Heidelberg, West Germany Olaf Medenbach Bochum-Querenburg, West Germany Eric Offermann Arlesheim...Leavens and Richard W. Thomssen Denny Mountain Quartz..................................................marbles with interbedded slaty and schistose members, quartz mica schists, and greenstones (Wright, 1915). Buddington |  | | Journal (issue) | | localities: Spruce Ridge in King County, Washington (for quartz and pyrite) and the Rock Candy mine in British...tourmaline, danburite, forsterite, fluorapatite, topaz, quartz and zircon, plus rare species like hibonite, johachidolite...fine specimens of hambergite, pollucite, topaz, quartz, aquamarine beryl and lepidolite (Hla Kyi et al...gemmy red elbaite crystals clustered on matrix with quartz and feldspar have emerged from Pyinygi Taung, where...Stone Tract represents one of ten important occurrences of gem-bearing white marble irregularly distributed |  | | Book | | Litchfield County, where good crystals were taken from quartz veins in a variety of metamorphic, plutonic and...William J. Brunet set out to trace three ilmenite occurrences mentioned in late 19th-century literature. One...Litchfield, where a mass of white quartz on a ridge had once been mined for quartz, and large ilmenite masses...ilmenite crystals to 7 .5 cm in matrix of massive quartz from these dumps-adding that, in his judgment,...major associations of Swiss hematite iron roses are quartz, ortboclase, albite, rutile, and zeolites (especially |  | | Journal (article/letter/editorial) | | Illite occurrences related to volcanic-hosted hydrothermal mineralization in the biga... Tonguç Uysal, I., Banks, David A., Illite occurrences related to volcanic-hosted hydrothermal mineralization...journal pertain. ACCEPTED MANUSCRIPT Illite occurrences related to volcanic-hosted hydrothermal mineralization...deposits has relied on fluid inclusion studies of quartz, or other gangue minerals, associated with the...inferred from a combination of AC oxygen isotopes in quartz and the hydrogen isotopic composition of fluids |  | | Book | | ................................ 428 8: babel quartz to bytownite .............................. 66...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...species to his increasing list of British first occurrences. What went unnoticed at the time was that the |
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Quartz occurrences, Hippeln, Hasserode, Wernigerode, Harz, Saxony-Anhalt, Germany