 | | Journal (article/letter/editorial) | | PO Box 524, Auckland Park Johannesburg, South Africa brucec@uj.ac.za TSAVORITE The Green Gem Variety...hibschite, hydrogrossular (Transvaal jade), and tsavorite, the emerald-green grossular. Variably colored...colored grossular specimens from the Jeffrey mine in Canada have previously been featured as a Connoisseur’s...depth and intensity of color to be considered tsavorite?” The answer is not straightforward but depends...superseded by the accepted name tsavorite (Bridges 1974). The term tsavorite is used here where the appropriate |  | | 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...father, Campbell Bridges, was the discoverer of tsavorite in both countries, and the first person to bring |  | | Journal (issue) | | Pakistan and Vietnam|Bicoloured grossular from Kenya|Jade-like materials sold in Myanmar|Blue kyanite...Tanzania|Rainbow moonstone from Malawi|News from the Oceanview mine, Pala, California|Scheelite from Inner Mongolia|Aging...Atichat 230 The Discoverer of Tsavorite—Campbell Bridges—and His Scorpion Mine By Bruce Bridges and Jim Walker...Hyršl, Prague, Czech Republic; Brian Jackson, National Museums Scotland, Edinburgh; Stefanos Karampelas...Jefferson City, Missouri, USA; J.C. (Hanco) Zwaan, National Museum of Natural History ‘Naturalis’, Leiden |  | | Journal (issue) | | world uncovered 18 A story of the discovery of tsavorite 22 Gem identity assurance for companies and...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 industry’s...Association, and was a founding member of the national executive. In 1990, he authored the best selling |  | | Catalog/List | | collection, a lot of it collected when the Tsumeb Mine (as well as other mines of the region) were still...crown jewel of the collection is a 65.72 ct. Tsavorite – the largest ever brought to auction. If that...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 |  | | Journal (article/letter/editorial) | | 04 October 2014 Department of Mineral Sciences National Museum of Natural History Smithsonian Institution...Washington, DC 20013 pohwatp@si.edu GROSSULAR Jeffrey Mine, Asbestos, Les Sources Municipalité Régional de...(minerals) in the Department of Mineral Sciences at the National Museum of Natural History (Smithsonian Institution)...Figure 1. Grossular, 7 × 8 cm, from the Jeffrey mine, Asbestos, Les Sources Municipalité, Régional de...grossular dodecahedra is commonly observed on Jeffrey mine specimens. This particular specimen is one of the |  | | Journal (article/letter/editorial) | | Abstract SE Kenya is the world’s largest producer of green vanadium grossular gemstones (tsavorite). Samples...yielded remarkable new insights into the genesis of tsavorite. Graphite is intimately associated with V-grossular...rocks (grossularites), as well as the gem quality tsavorite crystals, since we propose that the anomalous...while the transparent gem quality grossular (tsavorite) displays only fluid inclusions. On the basis...the peculiar evaporitic host lithology of the tsavorite deposits. Near peak metamorphic temperatures (~ |  | | Journal (issue) | | ICA News ICA Congress Focuses on Color in China Mine Tour in China – A Cultural Awakening Mining...DIRECTORS Edward W. Boehm, USA Campbell Bridges, Kenya Terrence Coldham, Australia Sushil Goyal, USA Nobuyuki...important. The diversity of the ICA membership, from mine to market, places our association in a central position...Brazil. Campbell Bridges, the legendary tsavorite miner from Kenya, was newly elected to the Board along...received the very sad and tragic news that a mob in Kenya attacked and brutally murdered legendary Scottish |  | | 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...gems are commonly exceedingly friable: the best ‘tsavorite’ (a trade name for V- and Cr-green grossular;...Feneyrol et al. 2010) from the Scorpion Mine (Mgama Ridge, southeast Kenya) could be mined with a teaspoon |  | | Journal (issue) | | spinel|Spurrite from New Mexico, USA|Tsavorite mining at the Scorpion mine, Kenya|Mussel pearls from the Philippines...Hyršl, Prague, Czech Republic; Brian Jackson, National Museums Scotland, Edinburgh; Stefanos Karampelas...Jefferson City, Missouri, USA; J.C. (Hanco) Zwaan, National Museum of Natural History ‘Naturalis’, 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 |  | | Journal (issue) | | TECHNIQUES . ,I REGULAR FEATURES 142 Well-Formed Tsavorite Gem Crystals from Tanzania Robert E. Kane, A n...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... NOTES A N D NEW T E C H N I Q U E S WELL-FORMED TSAVORITE GEM CRYSTALS FROM TANZANIA By Robert E. Kane,...with the grossular variety popularly 1<11ownas tsavorite. The very distinct and complex morphology of these |  | | Book (edition) | | source ofgood advice); this book is as much yours as mine. 000001030626 TINT CONTENTS Contents Foreword...Diopside 232 Spessartite 238 Tanzanite 244 Tsavorite 250 Turquoise 258 Chapter 3: Gemstone Jewellery...per carat. That seems pretty precious to me! Tsavorite. commercial viability, ae for example Nip...Russian Diopside Trapiche Emerald Peridot Tsavorite Other green gems include Aragonite, Azurmalachite...area where gemstones occur. A deposit is called a ‘mine’ after it has been worked and one gem deposit can |  | | Book (edition) | | The author in the shaft of the Consorsio Emerald Mine, La Pita Complex, Boyaca, Colombia. Photo: Ron Ringsrud...Chapter 20 D emantoid Garnet... 167 Chapter 21 Tsavorite Garnet ... 171 Chapter 22 Malaya Garnet ... 177...took us to the mines, explained the geology of tsavorite and hosted my wife and me on our second trip to...Demakopoulou, ed. , The Aidonia Treasure (Athens: National Archaeological Museum, 1996), p. 51. CHAPTER...II of this book are fairly recent discoveries: tsavorite garnet, tanzanite and malaya garnet were completely |  | | Journal (issue) | | ruby from Tanzania • Fiftieth anniversary of tsavorite discovery • New azuritemalachite mixture from...ct Constellation, was recovered from the Karowe mine in Botswana in November 2015. It is currently the...than the typical silicate glasses produced by the National Institutes of Standards and Technology (NIST)...from a larger type IIa diamond from the Letšeng mine, Lesotho (sample Letseng_889, inclusion F). For...the large diamond offcut samples from the Letšeng mine in Lesotho. In it, two majoritic garnets were observed |  | | Journal (issue) | | Corvette factory • Imperial topaz sculpture • Scorpion tsavorite mine update • Jewelry Television • Paula Crevoshay...Condensed Matter, Vol. 24, 435503-1–435503-5. Lim H., Park S., Cheong H., Choi H.-M., Kim Y.C. (2010) Discrimination...(1995) Gems and Gem Deposits of Sri Lanka. The National Gem and Jewellery Authority of Sri Lanka, Colombo...California. Mr. Lucas researches and documents the entire mine-to-market gem and jewelry industry for GIA education;...Milan. Dr. Diella is a senior researcher at the National Research Council, IDPA, Milan Organizational Support |  | | Journal (issue) | | Evolution sapphire; 61 zircons, 4.94 ctw.; one 2.50-ct Mine to Market – Evolution of the Rough Trade pear-shape...Thailand Masaru Mizumura, Japan Alice Muthama, Kenya Pearl Ng, Hong Kong Kobi Sevdermish, Israel Captain...participants included: Mercury Free Mining; the Ghana National Association of Small-Scale Miners (GNASSM); and...Colored Gemstone Association Experts from the Ghana National Association of Small-Scale Miners (GNASSM) demonstrate...and explain to gold miners at the Tarkwa hard rock mine in Ghana about the GOLDROP machine and process, |  | | Journal (issue) | | work on the locality." Dr. Dunn joined the U .S. National Museum (Smithson ian Instituti on) as a mineralogist...After retirement, Pete l ived simply in his Fairfax County, Virgi nia ho use. Yet, he embarked o n new pursuits...spense at no charge to the locals. He was a volunteer park ranger and even sat in o n a l ocal women 's coffee...1987): 72: 157-166. Nikischcr. A .J .. Review of Mine Hill in Franklin and Sterling llill .. . Mining...terms used to describe cases. together with a good mine ra ls and a series of o ne collection of Indian |  | | Journal (issue) | | Peter Bancroft The Braen Quarry, Haledon, Passaic County, New Jersey . . . . . . . . . . . . ...stopped for a minor traffic infraction by a Pima County Sheriff’s 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...Bridges is holding a rock specimen containing a tsavorite nodule. employees were wounded in the fight. The...family’s 6-square-km concession (2–3 km from the Scorpion mine) for the last three years, and had made numerous |  | | Journal (issue) | | Imtizam, Sri Lanka Rajiv Jain, India Susie Kennedy, Kenya Phuket Khunaprapakorn, Thailand Kamal Kothari, India...members include the Union Française de la BJOP, National Management of Mineral Resources” project. Association...certification at the Rapaport conference (photo national trade organizations and inreduction and social...they can move safely Corridor project. between national parks and other protected forests. Other supporters...Attenborough and David Gower. Gemfields says that its mine-to-market capability guarantees the provenance of |  | | Book | | ancient mine sites from Greek and Roman authors who were not in the gem trade. Fictional mine sources...could also hamper modern efforts in locating ancient mine sources. However, Theophrastus is quite explicit...One thing seems certain, however: the Carthaginian mine source must have been rather extensive, lasting...Hydrogrossular Hydroandradite Schorlomite Variety names Tsavorite --------------------------------- Hessonite; Demantoid;...scientifically created in connection with the National Bureau of Standards and is 28 Modem garnet |  | | Journal (issue) | | Tanzania|Trapiche ruby from Myanmar|Sapphires from Kenya|Shattuckite and bisbeeite from the DRC| Purple tourmaline...Hyršl, Prague, Czech Republic; Brian Jackson, National Museums Scotland, Edinburgh; Stefanos Karampelas...Jefferson City, Missouri, USA; J.C. (Hanco) Zwaan, National Museum of Natural History ‘Naturalis’, Leiden...Quarter is available for free download from the National Association of Jewellers’ website at http://tinyurl...zwaan@naturalis.nl) Netherlands Gemmological Laboratory National Museum of Natural History ‘Naturalis’ Leiden, |  | | Book | | technical knowledge and expertise far greater than mine. Although there certainly is a place for books...formidable collection of Museum Institution's National found all is at the Smithsonian of Natural...(spessartine) garnet, padparadscha, rubellite, tanzanite, tsavorite. ry m Phenomena Gem phenomena result from...miners is a very risky business. It would be park and gather the rough in a an Easter-egg hunt when...Whether the rough consists of large stones from a mine or tiny pebbles from alluvial deposits found in |  | | 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) | | Brazil|Apatite from Kenya|Colourless to near-colourless diopside from Canada and Kenya|Hessonite from S...Hyršl, Prague, Czech Republic; Brian Jackson, National Museums Scotland, Edinburgh; Stefanos Karampelas...Jefferson City, Missouri, USA; J.C. (Hanco) Zwaan, National Museum of Natural History ‘Naturalis’, Leiden...Jewellery Buying Trends A survey conducted by National Jeweler on behalf of the Silver Institute’s Silver...Cédric Simonet Akili Minerals Services, Lavington, Kenya Mark H. Smith Thai Lanka Trading, Bangkok, Thailand |  | | Catalog/List | | (5) graduated Tourmaline crystals from the Paprok Mine of Afghanistan • A giant Rwandan Amethyst gemstone...museum-quality mineral association from the Tsumeb Mine featuring Azurite and Smithsonite • An enormous...to stay informed and comply with International, National, State and Local regulations pertaining to collecting...Estimate: $1,000-$1,500 72006 Azurite Milpillas Mine, Cuitaca Mun. de Santa Cruz, Sonora Mexico The secondary...blue coloration. Examples from the famous Milpillas Mine in Sonora, Mexico have captivated the world for |
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Scorpion Mine, Tsavo National Park, Voi, Taita-Taveta County, Kenya