 | | Journal (article/letter/editorial) | | The Netherlands GEOLOGICAL SETTING OF ZAMBIAN EMERALD DEPOSITS A.S. SLIWA and C.A. NGULUWE Zimco Limited...Lusaka (Zambia) ABSTRACT Sliwa, A.S. and Nguluwe, C.A., 1984. Geological setting of Zambian emerald deposits...deposits. Precambrian Res., 25 : 213--228. The Kafubu emerald deposits occur within rocks of the Muva Supergroup...immediately southwest of the well known Copperbelt of Zambia. Within the Muva Supergroup are persistent...feldspar--quartz--muscovite bodies or as minor quartz--tourmaline veins. Contact aureoles of the pegmatitic veins |  | Ren, Junping, Wang, Jie, Zuo, Libo, Liu, Xiaoyang, Dai, Chaocheng, Xu, Kangkang, Li, Guozhan, Geng, Jianzhen, Xiao, Zhibin, Sun, Kai, He, Fuqing, Gu, ALei (2017) Zircon U–Pb and biotite 40Ar/39Ar geochronology from the Anzan emerald deposit in Zambia. Ore Geology Reviews, 91. 612-619 doi:10.1016/j.oregeorev.2017.08.034 | Journal (article/letter/editorial) | | and biotite deposit in Zambia 40 Ar/39Ar geochronology from the Anzan emerald ⁎ Junping Rena, , Jie...Biotite 40Ar–39Ar age Anzan emerald deposit Zambia The Kafubu Emerald Area in Zambia is an important producer...rock and emerald-hosting biotite chlorite schist from the Anzan emerald deposit in the Kafubu area, Zambia...chronology measurements of the country rock and emerald-hosting rock which belong to Muva Supergroup, yielding...redefined the age of Muva Supergroup in the Copperbelt Province in Zambia to be older than or equal to 1966 ± |  | | Journal (article/letter/editorial) | | Kagem mine, the largest emerald mine in the world, in the Kafubu district, Copperbelt Province, Zambia...Zambia. This mine, which has been producing exceptional gem rough since the 1970s, has recently been the...green gemmy emerald crystals in white quartz matrix. Emerald was first discovered in the Kafubu area by the...is known as the Miku locality. Only small quantities of relatively mediocre emerald rough were produced...9(3: Figure 1. A recent view of part of the Kagem mine showing subvertical pegmatite dike swarms in the |  | | Journal (issue) | | Mineralogie, Vol. I I , Leipzig. 7 THE EMERALD OCCURRENCE OF MIKU, ZAMBIA By PROFESSOR DR HERMANN BANK, F.G...of emeralds which are reported to originate in Zambia. " T h e suppliers who cut these stones would give...that they had originated from claims in the Kitwe district; hence . . . the exact location cannot be given...Information has been received that one origin of emerald is Miku, Z a m b i a . " W h e n the writer read this...remembered that he had seen and examined emeralds from Zambia some years ago; that some of these stones had also |  | | Other Paper | | Large-scale mining license 3. Large-scale gemstone license Main Points of the Zambian Mining Act ...7. Artisanal mining right 4. Small-scale prospecting permit 5. Small-scale mining license 4. Royalties...exceed 4 km2 Exclusive rights for exploration and mining operation for 2 years, not renewable Not to exceed... Appendix II-2 Structure of Mineral Rights in Zambia Type of Right Place of Application Required Documents...relinquishment is mandatory for renewal. LARGE-SCALE MINING LICENSE Registry for Minerals Rights (RMR) - Prescribed |  | | Journal (issue) | | properties. pg. 89 116 Emeralds from the Kafubu Area, Zambia J. C. (Hanco) Zwaan, Antonín V. Seifert...properties of emeralds from this, the second largest emerald-producing country in the world, are described.... 150 Mt. Mica: A Renaissance in Maine’s Gem Tourmaline Production William B. (Skip) Simmons, Brendan...again producing fine tourmalines, with both the mining area and the gems examined in this report. pg....cultured pearls • More on Cubearing color-change tourmaline from Mozambique 176 Gem News International |  | | Journal (article/letter/editorial) | | i e r. c o m / l o c a t e / o r e g e o r ev Emerald deposits and occurrences: A review L.A. Groat a...Available online 22 April 2008 Keywords: Emerald deposits Emerald occurrences Crystal chemistry Geochemistry...isotopes Classification Exploration A B S T R A C T Emerald, the green gem variety of beryl, is the third most...emeralds. However there is speculation that the emerald mines in Colombia are becoming depleted. Brazil...currently accounts for approximately 10% of world emerald production. Emeralds have also been mined in Afghanistan |  | | Report (issue) | | our way through the compet itive minefield of emerald science, much of John's contribu tion to this...any other opinion. extraLapis English No. 2: Emerald The Most Valuable Beryl The Most Precious Gemstone...we • pay tribute to John Sinkankas to whom this emerald issue is dedicated. John Sinkankas wrote more...than 15 books including his 1981 definitive work Emerald and Other Beryls. He set standards for authors...Gloria & Gunther A 2001 Find of top-quality emerald crystals from La Pita at Maripi, Boyac |  | | Journal (issue) | | Branch: M. P. Gayton, F.G.A. South Yorkshire & District Branch: I. R. M. Lewis, F.G.A. Examiners: B. W...BRITAIN Vol. XVII N o . 7 JULY 1981 GOLDEN YELLOW TOURMALINE OF GEM QUALITY FROM KENYA By HENRY A. HÄNNI...Recalculating the analyses to the general formula of tourmaline (Table 2), assuming 3 B atoms per formula unit...Ti0 2 . So far this is the first dravite-uvite tourmaline with such low Fe content. On some rough crystal... It is not possible to determine the type of tourmaline by its lattice constants alone. Together with |  | Zachariáš, J., Žáček, V., Pudilová, M., Machovič, V. (2005) Fluid inclusions and stable isotope study of quartz-tourmaline veins associated with beryl and emerald mineralization, Kafubu area, Zambia. Chemical Geology, 223 (1) 136-152 doi:10.1016/j.chemgeo.2004.12.023 | Journal (article/letter/editorial) | | quartz-tourmaline veins associated with beryl and emerald mineralization, Kafubu area, Zambia J. Zachariáš...Accepted 16 May 2005 Abstract The Kafubu Emerald Area in Zambia is an important producer of gemstone-quality...numerous pegmatite dykes and epigenetic quartz-tourmaline veins in Mg-rich metabasites. Where these dykes/veins...emeralds. Three types of hydrothermal quartz-tourmaline mineralization were identified: banded finegrained...oxygen isotope composition (y18O) of quartz and tourmaline is quite homogeneous (10.9 F 1x and 8.4 F 0.7x |  | | Journal (issue) | | near Kuruman, South Africa Herbert S . Pienaar Tourmaline as an Inclusion in Zambian Emeralds John I. Koivula...and describes the wide range of methods used to mine th e corundum . Gemologically, the Th ai rubies...ident ify many of the inclusions. The trip into the mining region would have bee n very difficufl if not for...these, 85% to 90% come from the Chanthaburi-Trat district alone (Aranyakanon and Vichit, 1979). While the.... The region can, however, be divided into two mining districts based on the type of corundum produced |  | Giuliani, Gaston, Groat, Lee A., Marshall, Dan, Fallick, Anthony E., Branquet, Yannick (2019) Emerald Deposits: A Review and Enhanced Classification. Minerals, 9 (2) 105 doi:10.3390/min9020105 | Journal (article/letter/editorial) | | minerals Review Emerald Deposits: A Review and Enhanced Classification Gaston Giuliani 1, *, Lee A....February 2019 Abstract: Although emerald deposits are relatively rare, they can be formed...systems and models currently used to describe emerald precipitation and predict its occurrence are too...mode of formation for some emerald deposits. Generally speaking, emerald is beryl with sufficient concentrations...crystals. The limiting factor in the formation of emerald is geological conditions resulting in an environment |  | | Book | | .^aU I i GEOLOGICAL MAP OF THE REPUBLIC OF ZAMBIA SIMPLIFIED ,J^ljTangonyiko LEGEND □ 200 M^Iq"... In the same series A guide to the Insects of Zambia Elliot Pinhey and Ian Loe A guide to the National...DWoecraite of Zambia by GERALD COORAY, PhD, DIC, FGS Professor of Geology, University of Zambia and ANDREW...PhD Formerly Lecturer in Geology, University of Zambia colour illustrations by GOODFELLOW PHIRI Group...rocks Industrial minerals Outline of the Geology of Zambia 34 14 Radioactive minerals METALLIC MINERALS |  | | Journal (issue) | | and chalcedonic concretions in anhydrite, Sandwith Mine, St. Bees, Cumbria. Bull. Geol. Surv. Gt Britain...('Bristol Diamonds') from the Triassic of the Bristol District. Geol. Mag., 113, 6, 569-74. Van der Voo, R. and...Emma Luisa goldmine near Huanaco in the Taltal Province. This first description by Dufet contains the...FROM E A S T AFRICA A stream-worn pebble of tourmaline was found in East Africa and is quite notable...hues normally associated with the common gem tourmaline, elbaite. A small section of the waterworn single |  | | Journal (issue) | | SPECIAL ISSUE December 2015 WORLD EMERALD UPDATE Highlights of Bogota Symposium Colombia opened its...world’s leading emerald experts from October 13-15. The First International Emerald Symposium was a huge...around the world taking part. More than 42 global emerald specialists from governments, labs and private...Fedesmeraldas, the Colombian Emerald Federation, and supported by all the country’s emerald-related bodies and...challenges and opportunities faced by the world’s emerald industry, including resource management, manufacturing |  | | Journal (issue) | | FEATURE ARTICLES 464 Geology of Corundum and Emerald Gem Deposits: A Review Gaston Giuliani and Lee...of the geology and genesis of gem corundum and emerald deposits. p. 569 512 A Review of Analytical...years, especially with the development of ruby mining in Mozambique. This contribution outlines GIA’s... 637 614 Geographic Origin Determination of Emerald Sudarat Saeseaw, Nathan D. Renfro, Aaron C. Palke...648 Geographic Origin Determination of Paraíba Tourmaline Yusuke Katsurada, Ziyin Sun, Christopher M. Breeding |  | | Journal (issue) | | rare polished pink diamonds from Australia’s Argyle mine that have been sold for 30 years through invitation-only...blue diamond discovered at the historic Cullinan mine in early 2014. 287 A Preliminary Study on the...News International Demantoid from Baluchistan province of Pakistan • New deposit of Ethiopian black opal...The photo on the cover shows diamonds from the Kao mine in Lesotho being prepared for tender. The 17.88...Botswana’s diamond industry, three-phase inclusions in emerald, HPHT synthetic diamonds, Myanmar’s remarkable |  | | Journal (issue) | | gem quality elbaite (lithium tourmaline) was made at the Dunton gem mine, Newry, Maine, U.S.A. The narrative...examples of New England "watermelon" tourmaline had come from this mine in years gone by, although most of...rubellite, is truly one of the most significant tourmaline discoveries of all time. The elbaite occurs as...Cross-section (40 mm radius) of "watermelon" tourmaline crystal zoned parallel to the prism. Section...Cross-section (7 em radius) of a "watermelon" tourmaline crystal zoned parallel to the prism. Section |  | | Journal (issue) | | Franks, B.Sc., Ph.D., F.G.A. South Yorkshire & District Branch: J. I. Platts, F.G.A. Examiners: A. J....A ugust, 1983. ] 404 J.Gemm., 1985, XIX, 5 EMERALD AND GREEN BERYL FROM BUCHA, MOHMAND AGENCY, NW...Peshawar, Pakistan ABSTRACT Deep bluey green emerald and light green beryl occur sporadically in talccarbonate-quartz...of Be is not clear. The beryl and emerald have high iron, the emerald also having higher MgO content and...include emerald, ruby, red spinel, sapphire, pink and yellow topaz, aquamarine, peridot, tourmaline, idocrase |  | | Journal (article/letter/editorial) | | 1529-1541 (2006) THE EMERALD- AND SPODUMENE-BEARING QUARTZ VEINS OF THE RIST EMERALD MINE, HIDDENITE, NORTH...and mineral compositions of the emerald occurrence at the Rist mine, Hiddenite, North Carolina, in order...and to examine the possible relationship between emerald and spodumene mineralization and granitic pegmatites...are calcite, amethystine quartz, spodumene and emerald. The early stage of vein development is characterized...observed. Keywords: emerald, chromian spodumene, hydrothermal quartz vein, Rist mine, Hiddenite, North |  | | Journal (issue) | | colourless), garnets including hessonite, spinel, tourmaline and zircon, in order of decreasing abundance...located on the gentle Figure 4: Complicated gem mining in a karstic channel in marble. J. Gemm., 2000...2000, 27, 2, 65-72 slopes, where spinel and tourmaline are more prominent. The corundums invariably show...mechanical abrasion shown by corundum, spinel and tourmaline show sharp crystal edges on the spinels and striations...have been the source of the tourmaline. In addition to Figure 6: Gem mining activities in a shallow gem |  | | Report (issue) | | Discovery Stoppaniite Fabio Tamagnini Page 40 Emerald and Aquamarine in Canada Lee A. Groat Page 22...studies in 1811, during A.G. Werner's time at the Mining Academy in Freiberg, Saxony (Germany). From 1826...miners. He was also the gemstone inspector for the mining authority. Breithaupt's legacy is 500 publications...descriptions. T he above is a postcard of the School of Mining in Feiberg, Saxony printed for the 1991 Breithaupt...morganite, emerald, goshenite, and heliodor. Known for millennia, the beryl varieties emerald and aquamarine |  | | Journal (issue) | | stones): (1) 2 5 . 4 3 ~ 1aquamarine, Santa Maria mine, Brazil; (2) 20.10-ct peridot, Burma; (3) 21.09-ct...16.28-ct rubellit8 tourmaline, Queen Mine, Pala, California; (6) 15.18-ct tourmaline, Paraiba, Brazil;...( 9 ) 10.45-ct tsavorite, Kenya; (10) 4.82-ct emerald, Colombia; (11) 8.31-ct pink sapphire, Sri Lanka;...diamond; (16) 6.38-ct ruby, Burma; (17) 3.08ct tourmaline, Paraiba, Brazil; (18) 1.85-ct fancy purple-pink... emeralds from Colombia and Zambia, and pegmatite gemstones (tourmaline, aquamarine, etc.) from Brazil |  | | Journal (issue) | | material known as " M a x i x e Beryl" from the Maxixe Mine (Minas Gérais, Brazil). This particular specimen...claimed it as a new mineral in 1933. T h e Maxixe Mine was then a recent discovery. T h e figures regarding...Recently, because of statements by scientists and mine-owners, we are wording our reports in a m a n n...Beryl mine also told me that no one (presumably in Brazil) knew the whereabouts of the Maxixe Mine. Following...INTRODUCTION About 1917 blue beryl was found in the Maxixe mine in Minas Gerais, Brazil, which h a d the following |  | | Journal (issue) | | greenish-blue to bluish-green. Until that time, emerald occurrences had not been known in Madagascar. Although...Although Levât (1912) had mentioned an occurrence of emerald of medium quality in Madagascar, but no detailed...external zone and an 'emerald green' nucleus, which did not consist of emerald, however, but rather of...green beryl. Sinkankas (1981) has mentioned an emerald occurrence located in the Mananjary-Ifanadiana...alluvial occurrence consists of small, rounded emerald fragments together with kyanite. The occurrence |
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