 | Shalaby, Ibrahim M., Stumpfl, Eugen, Helmy, Hassan M., El Mahallawi, Mahmoud M., Kamel, Omar A. (2004) Silver and silver-bearing minerals at the Um Samiuki volcanogenic massive sulphide deposit, Eastern Desert, Egypt. Mineralium Deposita, 39 (5) 608-621 doi:10.1007/s00126-004-0427-y | Journal (article/letter/editorial) | | minerals at the Um Samiuki volcanogenic massive sulphide deposit, Eastern Desert, Egypt Received: 22 August...2004 Abstract The Um Samiuki Zn–Cu–Pb–Ag mineralisation, south Eastern Desert, Egypt is hosted by felsic...at the top of rhyolitic breccia in the Western and Eastern mine areas. In each occurrence, a bornite-bearing...and covellite accommodate 80% of silver in the Um Samiuki deposit. Ag was incorporated in the crystal structure...D. Lentz I. M. Shalaby Geological Survey of Egypt, Egypt E. Stumpfl Institute of Mineralogy and Petrology |  | | Journal (article/letter/editorial) | | Neoproterozoic ophiolites of the Eastern Desert, Egypt Adel A. Surour PII: DOI: Reference: S0024-4937(19)30211-7...Neoproterozoic ophiolites of the Eastern Desert, Egypt, LITHOS, https://doi.org/10.1016/j.lithos.2019.05...Neoproterozoic ophiolites of the Eastern Desert, Egypt CR IP T Adel A. Surour* adelsurour@hotmail.com...Faculty of Science, Cairo University, 12613 Giza, Egypt * AC CE PT ED M Corresponding author. ACCEPTED...CR IP T ophiolitic mélange; northeast Africa (Egypt) ACCEPTED MANUSCRIPT 1. Introduction The ophiolite |  | | Report (issue) | | cm tall andradite on hematite is from the Wessels Mine near Hotazel in northern Cape Province, South Africa...Cover: Grossular on diopside; 7.1 cm tall Jeffrey Mine, Asbestos, Richmond County, Quebec, Canada Paul...to this series Facing page: Faceted pyrope-spessartine from Kenya 99.5 carats Houston Museum of Natural...KOURlMSKY AND JAROSLAV HYR�L Classic Garnets: Spessartine BY GLORIA STAEBLER, DUDLEY BLAUWET GARY ZITO...PAUL POHWAT, JOACHIM ZANG AND THOMAS FEHR 66 Spessartine from Tongbei BY BERTOLD OTTENS 70 Pakistan |  | | Journal (article/letter/editorial) | | Mn-silicates from the Smith prospect and MangaChrome mine, Sierra Nevada, California were deposited as ocean...relatively uncommon layers of jacobsite. The Manga-Chrome mine also contains layers rich in manganoan calcite and...and caryopilite. Tephroite, rhodonite, spessartine, and accessory alleghanyite and sonolite formed during...MangaChrome as metavolcanic clasts and as Mn-poor, red, garnet- and hematite-rich layers. There is no evidence...samples from the Smith prospect and Manga-Chrome mine have high Mn/Fe and low concentrations of Ni, Cu |  | Dekoninck, Augustin, Monié, Patrick, Blockmans, Sabine, Hatert, Frédéric, Rochez, Gaëtan, Yans, Johan (2019) Genesis and 40Ar/39Ar dating of K-Mn oxides from the Stavelot Massif (Ardenne, Belgium): Insights into Oligocene to Pliocene weathering periods in Western Europe. Ore Geology Reviews, 115. 103191 doi:10.1016/j.oregeorev.2019.103191 | Journal (article/letter/editorial) | | into Oligocene to Pliocene weathering periods in Western Europe T Augustin Dekonincka, , Patrick Moniéb...assemblages (mainly rhodochrosite and/or kutnohorite, spessartine, muscovite, chloritoïd, andalusite, hematite)...Mn, from which Mn oxides have precipitated. Spessartine and other Mn-silicates have poorly contributed...ages with others obtained in supergene ores of Western European massifs define a long- Corresponding...Vasconcelos, 1999; Vasconcelos et al., 1992). In Western Europe, several locations contain terrestrial Fe-Mn |  | | Journal (issue) | | adjacent Rio Grande do Norte State. 278 pg. 261 Spessartine Garnet from Ramona, San Diego County, California...on amethyst, citrine, and ametrine from the Anahí mine, Bolivia • “Copal” resin from Madagascar • Iolite...California was the world’s leading source of fine gem spessartine for most of the 20th century. Prized for its...its bright orange color, most of the spessartine was mined from 1955 to 1994. This 18K gold necklace contains...contains 139.63 carats of Ramona spessartine (ranging from approximately 1 to 7 ct) and 3.91 carats of |  | | Journal (article/letter/editorial) | | Mackay, north Queensland, in 1912. His father was a sea captain and amateur naturalist who often brought...came from Prospect quarry, near Parramatta in western Sydney. Unlike today, at that time the area around...Smithsonite. (7 × 4 cm; D49972), Broken Hill Proprietary mine, Broken Hill, New South Wales. Prospect dolerite...Figure 6. Anglesite (5 × 3 cm; D49920), Proprietary mine, Broken Hill, New South Wales. Figure 7. Pyromorphite...(4.7 × 3 cm; D49966), 17 Level, Zinc Corporation mine, Broken Hill, New South Wales. specimens from these |  | | Journal (article/letter/editorial) | | [University of Kent] at 15:29 06 November 2014 Spessartine Marienfluss, Northern Namibia I n a recent...array of orange and red hues of both almandine and the closely related species spessartine have made them...of this year’s Tucson Gem and Mineral Show, spessartine has been chosen as this issue’s Connoisseur’s...a fine spessartine specimen from Marienfluss, northern Namibia, has been chosen. Spessartine, because...of brown, yellow, orange, and red; almost pure end-member spessartine is bright orange. It is typically |  | | Journal (article/letter/editorial) | | Case Study from the Palaeogene Sandstones of the Western Carpathians (Eastern Slovakia) Katarína Bónová...Flysch (FB) belts in the easternmost part of the Western Carpathian realm. Detrital Cr-spinels in these...chemical compositions with those from the different Western Carpathian geological units, which could feed the...provenance; Pieniny Klippen Belt; Magura Unit; Western Carpathians 1. Introduction Heavy mineral (HM)...derived from collisional orogens [26]. In the Western Carpathian realm, chromian spinels have been geochemically |  | | Journal (issue) | | Articles Mineralogy and paragenesis of the Little Three mine pegmatites, Ramona district, San Diego County, California...eastern college and assigned to work in one of the western states with one of the best geologists on the Survey...plus an interesting range o f rare species. The mine, first opened in 1903, continues to produce fine...fine specimens. T INTRODUCTION The Little Three mine is one of several mines located on the Little Three...Ramona district, San Diego County, California. This mine, strictly speaking, is developed in the Little Three |  | | Journal (article/letter/editorial) | | Willyama Supergroup of the Curnamona Craton in western New South Wales (Fig. 1). The Broken Hill Domain...minor (e.g. Parnell Mine, Southern Cross Mine, Nine Mile Mine) and small (e.g. Potosi Mine) Broken Hill-type...Pits shows that the Zinc Lodes on CML7 are on the western limb on an inverted F1 nappe and that the Lead...the top of the Thackaringa Fig. 3. Regional and mine stratigraphic subdivisions of the Willyama Supergroup...7 on CML7 and Unit 4.4 amphibolite deep on the western part of CML7 is correlated with magnetic amphibolite |  | | Thesis/Dissertation | | described using the end-members pyrope, almandine, spessartine, andradite, grossular, and uvarovite. The large...grossular and andradite) and pyralspite (pyrope, spessartine and almandine). The chemistry of the pyralspite...compositions were reported such as pyrope-andradite, spessartine-grossular, and almandine-grossular. This study................................... 36 2.5.8. Spessartine ........................................................................ 38 2.5.9. Pyrope-spessartine ............................................ |  | | Book | | civilization, decorated with colorful, opaque stones-red carnelian, green steatite, agate, jasper, amazonite...Medicinal powers of gems were first recorded in Western literature by the Greeks. These virtues, as well...lapidaries. The first important references in Western literature are from the Greek Theophrastus (c....developed. Lapis lazuli from Badakshan reached Egypt before 3000 B.C. and Sumer (Iraq) by 2500 B.C. China...source. By around the second millennium, Phoenician sea merchants were trading Baltic amber on the coasts |  | | Book | | 200 known here-holds the productive Mwadui diamond mine, known for Yeryfine, rare, pink diamonds. Emerald...Tanzania 76 Tsavorite Garnets 76 The Pyrope-Spessartine-Almandine Garnets from Umba, Tanzania 86 Chapter...East Africa Elbaite Tourmaline from Tanzania 96 Red Dravite Tourmaline from the Narok District, Kenya...Williamson Mine and operations. 21 Figure 2.5. A 2. 9-carat pink diamond from the Williamson Mine. 25 Figure...crystal. 77 Figure 3.12. Umba, Tanzania, corundum mine. 42 Figure 6.3. Campbell Bridges. 78 Figure 3 |  | | Book (edition) | | the prophetically named Kimberley district of Western Australia promise to be of world importance when...chalcedony found in Rhodesia. The staff of both western and eastern headquarters of the Gemological Institute...First Edition For two decades, an earlier work of mine – Practical Gemmology – has proved a useful elementary...right) in eclogite, which also contains garnet (red) and pyroxene (black) One other kind of volcanic...volcanic rock is the source of diamonds at Argyle in Western Australia. This is lamproite and, like kimberlite |  | | Journal (issue) | | andradite-uvarovite-grossular: Pinet and Smith, 1993; for spessartine-almandine-pyrope: Pinet and Smith, 1994). In...unspecified pyroxene in demantoid garnet from the western Carpathian Mountains of central Europe. With the...structures from the Munni Munni layered intrusion, Western Australia. Terra Nova, Vol. 8, Abstract Supplement...The natural aluminian series pyropealmandine-spessartine. Schweizerische Mineralogische Petrographische...given. The samples are members of the pyrope-spessartine solid-solution series, with smaller constituents |  | | Journal (issue) | | .................................... 17 DAOPING MINE Guanghua Liu and Berthold Ottens .................crystal, 2.1 cm, from the Dadongla (Yunchangping) mine near Tongren, Guizhou Province, China. Marcus Budil...Xikuangshan, the site of the world’s largest stibnite mine. Berthold Ottens is a German dealer and author of...upon the scene and were eagerly absorbed by the Western market. Perhaps Russia’s neighbor to the south...capitalist world in order to sell their products to the Western countries and enjoy a much improved balance of |  | | Journal (article/letter/editorial) | | Proposed Continental Margin in the Preeambrian of Western Kenya By JULIAN It{. VEAllNCOMBE, Open University...Abstract From west to east across the Preeambrian of western Kenya a change of tectonic units from Archaean...continent to continental margin, to shelf and then deep sea conditions, is also recognised in the associated...rocks of the Mozambique (Pan-African) belt of western Kenya were younger than the lower grade Archaean...continental margin. Foreland The Arehaean of western Kenya comprises Nyanzian and Kavirondian sediments |  | | Journal (article/letter/editorial) | | Minerals of the Hutter Mine A New Manganese-Barium Mineral Locality in Northern Pittsylvania County,...with recontouring old mine dumps at the nineteenth-century Hut ter iron mine in Pittsylvania County...rhodonite), manganese-rich sphalerite, alabandite, spessartine garnet, barium-manganese mica (kinoshitalite)...the Pittsville area, the Hutter mine (also known as the Heiter mine) ceased production in 1903 (Watson... and Energy began a project to seal mine shafts and reclaim mine dumps on the Hutter property. Recontouring |  | | Journal (issue) | | mountain range (figure3 ) .These mountains form the western end of the Himalayas, which stretch eastward across...indicate that the Hindu Kush area represents the western end of a succession of important gem-producing...travel by foot. The Hindu Kush range forms the western end of the Himalayas and stretches from central...color and quality to those from the famous Muzo mine of Colombia, have emerged from Afghanistan in recent...Mohamuddin, one of the discoverers of the Buzmal mine, approximately 1,000 workers are mining emeralds |  | | Journal (article/letter/editorial) | | plumes of debris at the mouths of over one hundred mine openings. Imbedded solidly in mica schist, the treasure...the Nile River or east to the shores of the Red Sea for further transport to the gem-cutting and goldsmithing...and sold many specimens of this beryl. These early red beryl crystals were very small, rather dull colored...Island) in the Red Sea. Possibly the rarest of all beryls, until the discovery of the unique red beryl of Utah...if not rare. A few special words about the Utah red beryl are not amiss here because of its extreme rarity |  | | Book | | in various places around the globe. Ruby is the red variety and sapphire is the blue variety, while all...green andalusite, garnet -grossular, and spessartine- and red-epidote) of “near” gem-quality from Thassos...transparent varieties of spodumene (kunzite), low-iron spessartine, and optical-grade quartz [1]. The Boqueirão...Transition from schorl to blue-colored tourmaline; (f) Red-colored tourmaline from the Boqueirão granitic pegmatite...single crystals with color and transparency. The mine is referred to by the locals as “Munaraima” and |  | | Journal (issue) | | smoky quartz, citrine, amethyst, апd otl1ers), red and Ыuе corundum, nep\1rite, jadeite, turqнoise,...small corundum crystals. Large crystals of purple-red corundum are concentrated in th_e inner соге, where...value consideraЬ!y . The color ofthe rнЬу is purple-red, rather deep, апd caнsed Ьу the presence of chrome... Ye,rzorire(omamenta/srone), rack(basalr)1vir/1 red spors of ca,·bonares. Уещог- Уаk/ш River, Subpo/a...interest to gemologists due to their very deep purple-red color, its even distribt1tion, and their asterism |  | Taguchi, T., Satish-Kumar, M., Hokada, T., Jayananda, M. (2012) PETROGENESIS OF Cr-RICH CALC-SILICATE ROCKS FROM THE BANDIHALLI SUPRACRUSTAL BELT, ARCHEAN DHARWAR CRATON, INDIA. The Canadian Mineralogist, 50 (3) 705-718 doi:10.3749/canmin.50.3.705 | Journal (article/letter/editorial) | | the endmembers of uvarovite, grossular, and spessartine. Chromite grains in the matrix are euhedral or...blocks, the western and the eastern. The eastern Dharwar craton (EDC) is separated from the western Dharwar...et al. 2011). The WDC is bordered by the Arabian sea on the west, the Deccan basalts to the north, and...batholithic Closepet granite (Drury 1984). The Western margin largely consists of a supracrustal assemblage...Arsikere-Banavara and Chitradurga plutons in the western Dharwar craton (Jayananda et al. 2006) and the |  | | Journal (article/letter/editorial) | | Kingdom, Czech Republic, Germany, France, Lothringia, Egypt, Nigeria and United States of America). The ages...cummingtonite; ferroactinolite), garnet (almandine – spessartine), carbonate (mainly sid- General and comparative...iron-formations are mainly from the Mount Tom Price Mine of the Hamersley Province which is part of the Pilbara...and II; Gongchianglin, China III and IV; Monarch Mine, Mutare greenstone belt, Zimbabwe V; Nigerian greenstone...Keweenaw Peninsula, Michigan, USA (Bethleham Steel Mine, Neganayi) and of the MacKenzie Mountains, Rapitan |
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