 | | Journal (article/letter/editorial) | | Auckland Park Johannesburg, South Africa brucec@uj.ac.za TSAVORITE The Green Gem Variety of Grossular Merelani...massive material from Pakistan (Anderson 1966). Grossular forms in contact-metamorphosed limestone/marble...the emerald-green grossular. Variably colored grossular specimens from the Jeffrey mine in Canada have previously...important question: âAt what point does green grossular have sufficient depth and intensity of color to...Tanzanian garnet and proposed the name vanadian grossular, now superseded by the accepted name tsavorite |  | | Book | | MINERALS& GEMSTONES of East Africa Burundi, Kenya, Rwanda, Tanzania and Uganda Bruce Cairncross Published...Africa 10 East African resources 12 Burundi 13 Kenya 14 Rwanda 16 Tanzania 17 Uganda 20 Gemological properties...through Tanzania, Kenya, Ethiopia and into the Sudan - has blessed East Africa, Kenya and Tanzania, with...now mainland Tanzania) and then progressing to Kenya - I am proud to say that the coloured gemstones...interesting fact is that both of the national gemstones of Kenya and Tanzania (tsavorite and tanzanite |  | | Journal (issue) | | fluorite from Pakistan and Vietnam|Bicoloured grossular from Kenya|Jade-like materials sold in Myanmar|Blue...Tanzania|Rainbow moonstone from Malawi|News from the Oceanview mine, Pala, California|Scheelite from Inner Mongolia|Aging...Discoverer of TsavoriteâCampbell Bridgesâand His Scorpion Mine By Bruce Bridges and Jim Walker Gemmological...HyrĆĄl, Prague, Czech Republic; Brian Jackson, National Museums Scotland, Edinburgh; Stefanos Karampelas...Jefferson City, Missouri, USA; J.C. (Hanco) Zwaan, National Museum of Natural History âNaturalisâ, Leiden |  | | Journal (article/letter/editorial) | | 04 October 2014 Department of Mineral Sciences National Museum of Natural History Smithsonian Institution...Institution Washington, DC 20013 pohwatp@si.edu GROSSULAR Jeffrey Mine, Asbestos, Les Sources MunicipalitĂ© RĂ©gional...(minerals) in the Department of Mineral Sciences at the National Museum of Natural History (Smithsonian Institution)...03:53 04 October 2014 Figure 1. Grossular, 7 Ă 8 cm, from the Jeffrey mine, Asbestos, Les Sources MunicipalitĂ©...stepped-growth modification of grossular dodecahedra is commonly observed on Jeffrey mine specimens. This particular |  | | Journal (article/letter/editorial) | | mode in graphite associated with V-bearing green grossular Rainer Thomas1 · Adolf Rericha2 · Walter L. Pohl3...2018 Abstract SE Kenya is the worldâs largest producer of green vanadium grossular gemstones (tsavorite)...tsavorite. Graphite is intimately associated with V-grossular and is one of the keys to understanding its origin...issues pertaining to the origin of the green grossular-dominated rocks (grossularites), as well as the...conditions during crystallization of both the grossular and graphite from a near-supercritical volatile- |  | | Catalog/List | | collection, a lot of it collected when the Tsumeb Mine (as well as other mines of the region) were still...engineering work took him to the Tsumeb Mine in Namibia. This mine is renowned for producing what are arguably... SESSION ONE MINERALS 57001 Azurite Level 8, Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia If the attachment...Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia Some of the best things to come from the Tsumeb Mine were...com/5236 57004 Mimetite Epimorph on Cerussite Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia The multiple stages |  | | Journal (issue) | | envision strategic alliances in a brotherhood of national and global organizations working together to educate...CIBJO, educational institutions, laboratories, national trade organizations, and government bodies in...industry information resource for the industry from mine to retailers. Created in conjunction with the industryâs...Association, and was a founding member of the national executive. In 1990, he authored the best selling...M Y CM MY CY CMY K ICA NEWS Australia's national gemstone, the production of an award winning opal |  | | Journal (article/letter/editorial) | | pallasite meteorites, gem benitoite from San Benito County California, and Colombian emeralds (for whose genesis...that has been successfully used in prospecting in Kenya, Brazil, and no doubt elsewhere. Association with...muscovite, across a stream from a gem tourmaline mine, Minas Gerais, Brazil. Photo: J. Saul. (Figure...Cr-green grossular; Feneyrol et al. 2010) from the Scorpion Mine (Mgama Ridge, southeast Kenya) could be...best rubies at the John Saul Ruby Mine in Tsavo West National Park, Kenya, came from what was with reason |  | | Book | | Contents 7 8 Grossular 90 Nomenclature and history 90 Grossular colours 91 Grossular chemistry: Ca 3...physical properties 95 Grossular inclusions 97 Sources for hessonite and colourless grossular Tsavolite garnet...Hydrogrossular 101 Unusual phenomenon grossular 101 Summary of grossular properties 102 Bibliography 102 ...Andradite 1.880-1.888 0.057 3.77-3.88 6Âœ Grossular 1.730-1.760 0.028 3.40-3.78. 7 P)TOJ>C 1.730-1...Andraditc Fe 3 Al2 (Si 0.ih Ca3 Fei (Si 0.ih Grossular Ca3 Ah(SiO4h Orangy-red, red, violet-red Green |  | | Journal (issue) | | Importers group warns of color-diffused sapphires. National Jeweler, October 16, pp. 43 and 65. Hughes R.W...10, No. 1. Ward F. (1987)Jade: Stone of heaven. National Geographic, Vol. 172, No. 3, pp. 282-3 15. Webster...Anthony R. K a m p f , and Horst K m p p Green grossular garnet crystals o f fine form and clurity have...gemological properties and composition with the grossular variety popularly 1<11ownas tsavorite. The very...early 1987, small amounts of gem-quality green grossular garnet (tsavorite)crystals (figure 1) have been |  | | Journal (issue) | | New Mexico, USA|Tsavorite mining at the Scorpion mine, Kenya|Mussel pearls from the Philippines 28 ...HyrĆĄl, Prague, Czech Republic; Brian Jackson, National Museums Scotland, Edinburgh; Stefanos Karampelas...Jefferson City, Missouri, USA; J.C. (Hanco) Zwaan, National Museum of Natural History âNaturalisâ, Leiden...technology. Supply remained constrained: Annual mine production increased by the slowest rate since 2008...apatite (some of which is gem quality) is the Sfordi mine in central Iran, where the crystals are hosted by |  | | Book (edition) | | source ofgood advice); this book is as much yours as mine. 000001030626 TINT CONTENTS Contents Foreword...area where gemstones occur. A deposit is called a âmineâ after it has been worked and one gem deposit can...gemstone to pass through seven pairs of hands from the mine to being set in jewellery and then sold to the consumer...Jade Ruby Star Ruby JAPAN Akoya Pearl BURMA KENYA Amethyst Blue Sapphire Indicolite THAILAND Black...Ugrandites Andradite Demantoid Grossular Mali Garnet (Andradite and Grossular) Merelani Mint yarnet Hessonite |  | | Journal (issue) | | founded in 1908 as the Education Committee of the National Association oj Goldsmiths; reconstituted in 1931...is initially used to divide the incoming "run-of-mine" shipments of diamonds into two groups called smalls...the Novello Prospect a n d the abandoned Twin Star Mine, both of which are located about 17 km N W . of...located some 6 km north of the famous Bikita lithium mine about 80 km east of Fort Victoria. Details of the...Shamvaian age (2,650 m. years). T h e Twin Star mine is only 6 or 7 km distant from the Novello Prospect |  | | Journal (issue) | | Care! ARIZONA WULFENITE Down Deep in the Rowley Mine GEM GARNETS Popular for Centuries THE BALTIMORE...toxic. This 6 cm spray of needles is from the Herja mine (Baia Mare, Maramures), Romania. (Gerhard Brandstetter...in the Rowley................... 22 This Arizona mine is a specimen treasure trove Winter rockhounding...Notes New owners took possession of the Mary Ellen mine property on July 1, 2014 and no collecting is being...are Mary Ellen jasper or came from the Mary Ellen mine, just west of Biwabik, Minnesota, is speculative |  | | Journal (issue) | | Tanzania|Trapiche ruby from Myanmar|Sapphires from Kenya|Shattuckite and bisbeeite from the DRC| Purple tourmaline...HyrĆĄl, Prague, Czech Republic; Brian Jackson, National Museums Scotland, Edinburgh; Stefanos Karampelas...Jefferson City, Missouri, USA; J.C. (Hanco) Zwaan, National Museum of Natural History âNaturalisâ, Leiden...Quarter is available for free download from the National Association of Jewellersâ website at http://tinyurl...and pyrope-spessartine, with or without some grossular (cf. Jackson, 2006). The magnetic data measured |  | | Book (edition) | | The author in the shaft of the Consorsio Emerald Mine, La Pita Complex, Boyaca, Colombia. Photo: Ron Ringsrud...Demakopoulou, ed. , The Aidonia Treasure (Athens: National Archaeological Museum, 1996), p. 51. CHAPTER...especially in Europe. The from Australia's Argyle Mine in the early 1990s was approximately equal to the...well-for,ned hexagonal enierald crystal. Conosco Mine, Boyaca, Colo,nbia. Photo: Jeff Scovil, courtesy...evolves into the star, the stellate brilliant, the old mine cut and, finally, into the modern round brilliant |  | | Journal (issue) | | Peter Bancroft The Braen Quarry, Haledon, Passaic County, New Jersey . . . . . . . . . . . . ...stopped for a minor traffic infraction by a Pima County Sheriffâs Deputy while driving home from work....ambushed and killed while returning to his mine near Tsavo in Kenya. His son, Bruce Bridges, and two of his...familyâs 6-square-km concession (2â3 km from the Scorpion mine) for the last three years, and had made numerous...gained fame for his discovery of the new gem grossular variety tsavorite in 1967. In 1968 he was among |  | | Journal (issue) | | 572 Gem Notes Catâs-eye aquamarine from Meru, Kenya|Colour-zoned beryl from Pakistan|Coloration of green...dravite from Tanzania|Enstatite from Emali, Kenya|Grossular from Tanga, Tanzania|Natrolite from Portugal|Large...HyrĆĄl, Prague, Czech Republic; Brian Jackson, National Museums Scotland, Edinburgh; Stefanos Karampelas...Jefferson City, Missouri, USA; J.C. (Hanco) Zwaan, National Museum of Natural History âNaturalisâ, Leiden...similar-appearing rubies of basaltic origin from Kenya, as well as those from amphibolite-related deposits |  | | Book | | discovered in Africa in 1951. CONTENTS I. II. THE NATIONAL GEM COLLECTION THE STUDY OF GEMS 10 III. THE...of the Hall of Museum Gems, which houses the National Collection Gems, a special Museum. Directly...the vault houses the Hope diamond, the THE NATIONAL GEM COLLECTION I. Man has been using certain...minerals, are derived from living organisms. In the National Gem Collection, the Smithsonian Institution has...visit the Smithsonian Institution each week. The National Gem Collection had its beginning in 1884 when |  | | Journal (issue) | | Ofllcen Bill Bums, President 1038 Bradshawe, Monterey Park, CA 91754 Ellen Schultze. First Vice-President 1516...A L1.25 - per -. ..âą..âą...âą..âą...âą $ oz. Better mine run . . . âą . . . . . âą . . . . 2.50 per OL Opal...Another source for Pellon submitted by Charles W. Park is: Econ-O-Cloth 3284 East Willow St. Long Beach...For ..,. llforaatlOâ , Write: EIDorado sapphire Mine 6240 Nelson Road Helena, MT 59601 !OARD Fig. 7...will take place July 26, 27 and 28 at the Ventura County Fairgrounds, Ventura, California. * Visions in |  | | Book | | opened in 1869 in the old Arsenal Building in Central Park. There was a small mineral "cabinet" to instruct...Soviet Union, the Malagasy Republic, and San Diego County, California, are remarkable for their gem-quality...and the Agnes Sorel, the mistress of , Kimberley mine began proKing Charles VII (1422-1450) duction in...place in rough dian1ond output. The giant Premier Mine has yielded many of the finest and most famous of...1496, but indirect evidence suggests 1nuch earlier mine operation. The m ines' p resent output is limited |  | | Journal (issue) | | 2009 Articles Famous mineral localities: The Sapo mine, Ferruginha district, Conselheiro Pena, Minas Gerais...Menezes Famous mineral localities: The Lac dâAmiante mine, Black Lake, Thetford Mines, QuĂ©bec . . . . ...cm, on muscovite, from Mount Xuebaoding, Pingwu County, Sichuan Province, China. Rob Lavinsky collection...has visited Arkansasâs Crater of Diamonds State Park many times over the last 30 years. His time spent...Jenks, one of the park geological interpreters on staff at the Crater of Diamonds State Park, said âIt is |  | | Journal (issue) | | been the discovery of violet gem scapolite (from Kenya?) with unusually low refractive indices and density...more yellow than its relatives from Canada and Kenya. The last stone was first taken to be a red taaffeite;...Gem garnets from Kenya and Tanzania are proving to be a new spessartite/pyrope/grossular combination hitherto...Stuttgarter Bernsteinsammlung. (First record of a scorpion from Dominican amber in the Stuttgart amber collection... This is the first record of a tertiary amber scorpion from the American continent and the most southern |  | | Journal (issue) | | BONANZAS by Eugene Conrotto. Brief resumes of lost mine articles printed in back issues of DESERT Magazine...by John D. Mitchell. The first of Mitchell's lost mine books is now available after having been out of...recreationists. Last month we explored the Hugh Osborne State Park, center of dune buggy activity, and this issue we... The sap was applied to cure insect bites and scorpion stings and the smoke from a burning tree was inhaled...half-millionacre Anza-Borrego Desert State Park in San Diego County. Though now a park attraction, it took many years |  | | Book | | Indexes * Vermont Soil-Tunbridge Series Gem-Grossular Garnet Rocks-Marble, Granite, Slate Mineral-Talc...go afoot and afield in their own search of our national treasures which are diverse as the terrain of...made the âMagic Cityâ of Birmingham, Jefferson County âThe Pittsburgh of the Southâ during the turn of...feet thick, occurs near Sylacauga, in Talladega County, being fine-grained and mostly white, ofexceptional...white Sylacauga marble from Sylacauga, Talladega County, is considered among the finest white marble in |
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Scorpion Mine, Tsavo National Park, Voi, Taita-Taveta County, Kenya