 | | Journal (issue) | | Yellow Topaz from Saxony, Germany History of Emerald Mining at Habachtal, Part II New Regular Feature:...No. 1 EDITORIAL 1 Yellow Topaz from Germany, Emerald Mining in Austriaâs Habachtal Region, A Return...behavior. 18 History of Emerald Mining in the Habachtal Deposit of Austria, Part II Karl Schmetzer The...two-part series on the mining history of Austrian emerald deposits in the Habachtal region. p. 40 REGULAR...nickel impurities ⢠Nail-head spicule in a Russian emerald ⢠Dyed fluorite ⢠Repaired grandidierite ⢠New |  | | Book | | Marshall, Anthony E. Fallick and Yannick Branquet Emerald Deposits: A Review and Enhanced ClassiďŹcation Reprinted...Origin of Blue Sapphire in Newly Discovered SpinelâChloriteâMuscovite Rocks within Meta-UltramaďŹtes of Ilmen... The ďŹrst group of authors in their review proposed an enhanced classiďŹcation for emerald deposits based...These sapphires were formed together with a spinelâchloriteâmuscovite rock during the metasomatic alteration...one of the images (inclusions hosted in Russian emerald) for the cover page of this Special Issue book |  | Lake, Donald J., Groat, Lee A., Falck, Hendrik, Mulja, Thomas, CempĂrek, Jan, Kontak, Daniel, Marshall, Daniel, Giuliani, Gaston, Fayek, Mostafa (2017) Genesis of Emerald-Bearing Quartz Veins Associated With the Lened W-Skarn Mineralization, Northwest Territories, Canada. The Canadian Mineralogist, 55 (4) 561-593 doi:10.3749/canmin.1700025 | Journal (article/letter/editorial) | | (2017) DOI: 10.3749/canmin.1700025 GENESIS OF EMERALD-BEARING QUARTZ VEINS ASSOCIATED WITH THE LENED... Winnipeg, Manitoba R3T 2N2, Canada ABSTRACT Emerald at the Lened occurrence in the western Northwest...transparent, bluish green, and can be considered pale emerald. Using field relationships, Ar-Ar dating, whole-rock...B), and mineral chemistry, the sources of the emerald-forming fluids and chromophores have been assessed;...muscovite) Lened emerald occurrence is a Type I (igneous) skarn-hosted emerald deposit related to the proximal |  | | Book (edition) | | to the chemical formula, allegiance to a mineral group, symmetry and crystal structure as well as the strongest...chemical formula, structure (crystal system, space group, and unit cell dimensions), and at least some other...site occupancy. The Sb members of the tennantite group (2.G) will serve as a good example: tetrahedrite...this book (e.g. in the amphibole group). For more detailed information see "Dana's System of Mineralogyâ˘Âˇ...dept. (departement), dept. (departamento), dist. (district). Less common terms are not abbreviated, e.g. |  | Zhitova, E. S., Popov, M. P., Krivovichev, S. V., Zaitsev, A. N., Vlasenko, N. S. (2017) Quintinite-1M from the Mariinsky Deposit, Ural Emerald Mines, Central Urals, Russia. Geology of Ore Deposits, 59 (8) 745-751 doi:10.1134/s1075701517080116 | Journal (article/letter/editorial) | | PARAGENESES Quintinite-1M from the Mariinsky Deposit, Ural Emerald Mines, Central Urals, Russia E. S. Zhitovaa...quintinite [Mg4Al2(OH)12][(CO3)(H2O)3] at the Mariinsky deposit in the Central Urals, Russia. The mineral occurs...in association with prehnite, calcite, and a chlorite-group mineral. Quintinite is the probable result...of primary mafic and ultramafic rocks hosting emerald-bearing glimmerite. According to electron microprobe...crystal XRD data, quintinite is monoclinic, space group C2/m, a =5.233(1), b = 9.051(2), c = 7.711(2) Ă
|  | | Book | | a few such specimens have been found after 1960 (see the Amity-Edenville entry for Edenite and Spine!)...Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series of incompletely...to 2 cm which are pseudomorphs after bastnasite--see photo in Guastoni, Pezzotta and Zorzi (2008). ILMENITE...euhedral, pale tan to white rnicrocline crystals-see photos in Dupuis and David (2013). ffighway 5 extension...molybdenite specimens showing crystals to 6 cm (see this entry for Molybdenite), and in a second roadcut |  | | Journal (article/letter/editorial) | | an aquatic and aeolian regime. It is mainly the group of heavy minerals that plays the major part among...and won for a profit (agate, amethyst, citrine, emerald, quartz, rose quartz, smoky quartz, morganite,...the periglacial/glacial and the high-altitude/mountain zones, where mechanical weathering and the paleogradients...accessory minerals, and in placer deposits, the latter group of minerals prevails over light minerals, in places...(industrial minerals), and diamond placers (gemstones) (see Section 3.8). Gemstones fulfill all physical requirements |  | | Book | | describing some of its chemical properties. Within each group the minerals are listed accordÂŹ ing to CIM; and...prospectors by placer mining. It is found along the mountain ranges of the western states, including California...rare Right: Sulphur crystals from Sicily showing a group of bipyramids 14 Horsfordite Horsfordite, an antimonide...Australia at Kalgoorlie; in the Cripple Creek district, Teller Co., Colorado and in Calaveras Co., California...(Landsberg) in W. Germany. The most important economic deposit is at Almaden, Ciudad Real, Spain. In California |  | | Book (edition) | | away beforc wc could finish this collaboration. I am pleased to have been able to finish lhis Glossary...Pierre-Jacques Chiappero (France). G. Daxner (Austria). M. Dcliens (Belgium). Giancarlo Delia Ventura... Keams (USA). Elisabeth Kirchner (Austria), Uwe Kolitsch (Austria). Werner Krause (Gennany). Andre Lalonde...Lalonde (Canada), P. Leblhuber (Austria), Andrew Locock (Canada). J.A. Mandarino (deceased) (Canada),...Filippo Olmi (deccased) (ltaly). Werner H. Paar (Austria). Gian Carlo Parodi (France). Marco Pa ero (ltaly) |  | | Journal (issue) | | up the information on a given specimen, but also group data in a variety of ways, and to reveal patterns...of Mines and the Virginia Polytechnic Institute. (See the guest editorial in this issue.) White has been...putting complete sets on the market than we used to see. Prices seem to range between $1,200 and $1,600 (bearing.../# 6 W agholi cavansite (India), Kom bat m ine (N am ibia), M adan m ines (B ulgaria), B eltana m ine...icosahedral alloys, which com prise the largest group, are compositions Al-M (where M = Cr, Mn, or Fe) |  | | Book | | own tumbling and grinding machineto cutting an emerald !The extensive reference section describes over...gdtanrc fc a nociuiacaftto.^tfug ctma bula mfanml.^oc am in lapidario fuo cnajc Capitulum.ltrrtni ÂŁdu8.C...of this here. Next we must consider a peculiar group of Magnesium (Mg) has two more electrons than elements...appropriate and, indeed, these are linked with an (Si04) group in the mineral forsterite. The chemical shortÂŹ hand...valencies and a bracket around the disÂŹ tinctive (Si04) group would result in forsterite symbolized thus: (Mg2)4 |  | | Journal (volume) | | Earth, Editorial and Design by T he Brown Reference Group pie ISBN O 7489 7935 2 NO i 07 04 18 Printed in...are often replaced by pyrite. FACT FILE PYRITE Group: Sulphides Crystal system: Cubic Habit: Cubes,...test is to strike it with a hard metal object to see if it gives off a spark. Genuine pyrite also melts...quartz rather brittle. FACT FILE ROSE QUARTZ Group: Oxides Crystal system: Trigonal Chemical formula:...CHARACTERISTICS Rose quartz is a member of the oxide group of minerals. It is an oxide of silicon, and it gets |  | | Journal (issue) | | what it can do, w hat it is used for, and t he group of minerals it belong s t o. Origins gives the location...refineries in Britain and Norway. The flare boom you can see extending from the rig platform is used to burn off...WORLD 0 F - - -- r°J The world's finest jet deposit is found at Whitby in Yorkshire, England. The British...the most fascinating examples in each min eral group. This map highlights some of the world's leading...in layman's terms below. GROUP Each mineral and gemstone belongs to a group, or family, of similar types |  | | Journal (issue) | | undiscovered at this time, whereas the nearby Sar-e-Sang Districtâred arrowâhad been mined for lapis lazuli for...northâ(1) the Korgal/Mawi/Kolum/Nilaw/Pashagar group; (2) the pegmatites of Dari-i-Pech (Pech River Valley);...Valley); (3) the Parun/Waygal/Chathras group; and (4) the Paprok group. This geologically young and very rugged...by the very high, very young (and still rising) mountain ranges, with several thousand meters of elevation...(âBlue Mountainâ), in the Kokcha River Valley of Badakhshan Province, may be the earliest gem deposit worked |  | | Journal (issue) | | of articles on all aspects of the field. Please see the Guidelines for Authors in this issue of the journal...offices. A great fan of the journal, he wanted to see where it was produced and meet the people responsible...the firm Julius Petsch Jr., Idar-Oberstein. Please see acknowledgments at end of article. Gems & Gemology...the most important discovery was the large emerald deposit found in the mid1950s at the area called Sandawana...study on the geologic factors that contributed to emerald formation in this part of Zimbabwe, but it also |  | | Journal (issue) | | of articles on all aspects of the field. Please see the Suggestions for Authors in this issue of the...deeper than 100 m (the C concession zones; again, see figure 3). Two other groups, Alexcor and Benguela...that is, cratons (for a review of this subject, see Kirlzley et al., 1991).Most of the diamondiferous...features with only a few cubic meters of gravel (again, see figure 8). Although the smaller diamonds are less...sites in which diamonds could be trapped (again, see figure 10). Today, there are at least eight different |  | | Journal (issue) | | Characterization of Emeralds from a Historical Deposit: Byrud (Eidsvoll), Norway Benjamin Rondeau, Emmanuel...edu/gemsandgemology or contact the Circulation Coordinator (see above). Single copies of this issue (print or PDF)...Knowledge) and other databases. For a complete list, see www.gia.edu/gemsandgemology. Gems & Gemology welcomes...of articles on all aspects of the field. Please see the Guidelines for Authors on our Website, or contact... CHARACTERIZATION OF EMERALDS FROM A HISTORICAL DEPOSIT: BYRUD (EIDSVOLL), NORWAY Benjamin Rondeau, Emmanuel |  | | Book | | gemstones. Cover illustration: A ruby, sapphire, emerald, citrine and diamond clip, mounted by Cartier,...reference book and a bench book. Acknowledgements I am grateful to Brian Jackson of the Department of Geology...places where amendment or alteration was needed. I am also grateful to the publishers of the books on which...a mineral belonging to the actinolitetremolite group having the nature of an asbestos. cabochon a gemstone...rarer. For example, the red and green of ruby and emerald require a source of chromium; without it the corundum | | | Book | | own tumbling and grinding machine to cutting an emerald! The extensive reference section describes over...Uranium Xenon i oat jum 22.98 Tb Ti Vanadium 11 See Titanium Tungsten 150.35 407.87 hase Te 52 ...of this here. Next we must consider a peculiar group of elements known as the imert gases. The first...appropriate and, indeed, these are linked with an (SiO4) group in the mineral forsterite. The chemical shorthand...about valencies tinctive (SiO4) and a bracket group would around the dis- result in forsterite |  | | Journal (issue) | | of articles on all aspects of the field. Please see the Guidelines for Authors in this issue of the journal... Herbert Smith's famous textbook Gem Stones, we see that the index to this volume refers to Sri Lanlza...liddicoatite, the calcium end-member of the tourmaline group.) Within the last two decades, important quantities...pegmatite minerals such as beryls and tourmalines (see)for example) Chil~ayama~ 1989) and emeralds from...occasionally in the literature (for geographic locations! see figure 2). Schmetzer (1986)mentions rubies from Vatomandry |  | | Book (edition) | | Chrysoberyl Spinel Topaz Tourmaline The Garnets Feldspar Group Zircon Peridot 69 92 117 150 167 171 175 185 195...materials described. I, as editor and major contributor, am ultimately responsible for those omissions and inaccuracies...This book is not intended to be a bench manual; see references in many places below to The Identification...what I am about to recommend, monographs by their nature cannot be so up-to-date; the ones I am using...authorities and cited full details in the text; I am grateful to my very large personal library for virtually |  | Henley, H. F., Brown, R. E., Brownlow, J. W., Barnes, R. G., Stroud, W. J. (2001) Grafton-Maclean Metallogenic Map (SH/56-6, SH/56-7) Metallogenic Study and Mineral Deposit Data Sheets. Geological Survey of New South Wales | Report (issue) | | Metallogenic Study and Mineral Deposit Data Sheets GRAFTONâMACLEAN 1:250 000 METALLOGENIC MAP SH/56-6...ClarenceâMoreton Basin from the coast south of Evans Head (see Photograph 12). Insets are: cut blue and gold New...molybdenite and quartz from Kingsgate (lower left, see Photograph 34); and crystals of cassiterite (dark...in a quartzâtopaz vein, Taronga prospect (right, see Photograph 30). Bibliographic reference HENLEY H...SH/56-6 and SH/56-7: Metallogenic Study and Mineral Deposit Data Sheets. Geological Survey of New South Wales |  | | Book | | The magical all ure of the cuclase 407 The exotic group of the garnets 408 Garnets of the pyralspite series...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...diversified mica group 602 The clay mineral groufa 604 The tectosilicate subc ass 605 The feldspar group 608 The...Helvite 611 Scapolite 612 The surprising zeolite group 619 The large quartz family 624 Rock crystal 630 |  | | Book | | new platinum-group minerals. Dr. Anna VymazalovĂĄ gave a keynote lecture âPlatinum-group minerals, new...a visit to the âPyataya (5th) Verstaâ corundum deposit in the area of Kasli town framed by the Vishnevogorsky...Bashkir Meganticlinorium can be seen from the Black Mountain (âChernaya Skalaâ) observation point of the world-famous...quarries with carbonatite veins of the Vishnevogorsky deposit where rare-metal mineralization could be found...Blinov PT-Parameters of the Egitinsky Fluorite Deposit (Trans-Baikalia, Russia) . . . . . . . . . . . |  | | Journal (issue) | | pyrope-spessartine ⢠CVD landscape ⢠Unmasking emerald filler ⢠Inclusions in Kenyan rubies from the John...International New emerald locality in Southern California ⢠Update on inclusions in emerald from Davdar, China...add GST. Discounts are available for renewals, group subscriptions, GIA alumni, and current GIA students...of articles on all aspects of the field. Please see the Author Guidelines at gia.edu/gemsgemology or...the Gem News International section with a new emerald locality in Southern California and the use of |
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