 | 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 UāPb 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 ā Junping Rena, , Jie...Biotite 40Arā39Ar 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...redeļ¬ned the age of Muva Supergroup in the Copperbelt Province in Zambia to be older than or equal to 1966 Ā± |  | | Journal (article/letter/editorial) | | Gemological Characteristics of Emeralds from Kamakanga, Zambia Yi Zhang and Xiao-Yan Yu * School of Gemology,...Currently, Zambia is one of the worldās major emerald-producing countries. In this study, emerald samples...samples from Kamakanga, Zambia, were systematically analyzed by standard gemological tests, microscopic observation...Gemological Characteristics of Emeralds from Kamakanga, Zambia. Minerals 2023, 13, 341. https://doi.org/10.3390/...creativecommons.org/licenses/by/ 4.0/). 1. Introduction Emerald is a variety of beryl whose ideal formula is Be3 |  | | Journal (issue) | | properties. pg. 89 116 Emeralds from the Kafubu Area, Zambia J. C. (Hanco) Zwaan, AntonĆn V. Seifert...properties of emeralds from this, the second largest emerald-producing country in the world, are described....again producing fine tourmalines, with both the mining area and the gems examined in this report. pg....lead the Instituteās groundbreaking studies on emerald fillers and diamond cut proportions. EDITORIAL...The bracelet and the 4.13 ct oval and 6.20 ct emerald cut in the rings are courtesy of Harry Winston |  | ZachariĆ”Å”, J., Å½Ć”Äek, V., PudilovĆ”, M., MachoviÄ, 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) | | veins associated with beryl and emerald mineralization, Kafubu area, Zambia J. ZachariaĢsĢ a,*, V. ZĢaĢcĢekb...Accepted 16 May 2005 Abstract The Kafubu Emerald Area in Zambia is an important producer of gemstone-quality...Quartz; Tourmaline; Beryl; Emerald; Oxygen isotopes; Fluid inclusions; Kafubu; Zambia 1. Introduction During...decades, Zambia has become a world-class emerald-producing country. The entire Zambian emerald output,...of the world market, comes from the Kafubu Area. The Kafubu Emerald Area (Fig. 1) covers approx. 200 km2 |  | | Journal (issue) | | ........................................... 57 Zambia..................................................Kong; GEA, Brazil; Emmanuel Piat, France; Israel Emerald Cutters Association, Israel; Gemstar, Israel; Tom...you the 2006 ICA Mining Report. A decade has past since ICA published its first Mining Report. No doubt...past gemstone mining was limited to just a few countries and locations, exploration and mining is becoming...becoming more widespread, with many new mining localities establishing themselves, some even becoming dominant |  | | Journal (issue) | | moving products from mine to consumer. The main cover image was taken at the AnahĆ mine in Bolivia, a major...diamond, GIA Collection no. 37583 (2) a 4.50 ct emerald from Chivor, courtesy of Equatorian Imports; (3)...instrumentation such as LA-ICPMSāonce primarily the province of academiaābecame a fixture in many gemological...the supply chain. The development of large-scale mining operations for colored gems has been in the news...of the decade forced major cutbacks in diamond mining and prompted industry banks to re-evaluate long-accepted |  | | Journal (article/letter/editorial) | | octahedra, 0.75 inch on edge, from the Henderson mine, Clear Creek County. Figure 2 (right). Green fluorite...County, Illinois, in the United States; in Hunan Province, China; and in the Primorskiy Kray region of eastern...Fluorite occurs in significant amounts in many of the mining districts of the Colorado mineral belt. [The Colorado...southwestern comer of Colorado. Most of the metal mining in Colorado has occurred within this belt since...finest specimens were recovered years ago during mining operations. Most of the mines are now shut down |  | | Journal (issue) | | FEATURE ARTICLES 166 Benitoite from the New Idria District, San Benito County, California Brendan M. Laurs...Multicolored Bismuth-Bearing Tourmaline from Lundazi, Zambia Mary L. Johnson, Cheryl Y. Wentzell, and Shane...only one location in the world, the Benitoite Gem mine, in San Benito County, California. This historic...of the Benitoite Gem mine, the geology of the New Idria district and current mining there, and the gemological...date, a 15.42 carat stone from the Benitoite Gem mine. An artistic rendering, by GIA designer Lainie Mann |  | | Journal (issue) | | Ukraine ā¢ Triplite from Pakistan ā¢ Gem localities in Zambia and Malawi ā¢ Barite āspearsā in fluorite ā¢ Inclusions...creation of a fine suite of peridot jewelry from the mine in the Himalayas to the manufacture of the necklace... in the Sapat Valley, Mansehra district, North West Frontier Province (Kausar and Khan, 1996; Hammer...partially serpentinized dunitic host rocks.ā The mine is situated in the western Himalaya Mountains at...level. Koivula et al. (1994a) reported that the mine could be reached by a seven-hour horseback ride |  | | Journal (issue) | | Offers Valuable Insights From Industry Leaders Jade Mining Expanding in British Columbia As Demand Rises Gemmological...Reveals Largest Violet Diamond Recovered from Argyle Mine Gemology 32 18 21 26 Harvard Mineral Heritage...speaking about the three big colored stones, emerald, ruby and sapphire, the name of a specific country...provenance of colored gemstones all the way to the mine that produce the stone. The vertically integrated...possible tied to transparency and provenance. from mine to market is being developed strongly. As a result |  | | Journal (issue) | | since 1969 since 1969 SEE OUR EMERALD āQUALITY CUTā SEE OUR EMERALD PROCESS PRESENTATION āQUALITY...Industry Background image: Miners at the Pala Chief Mine, San Diego Country, California, circa 1903. On the...They are Found zite (201 cts) is from the Oceanview Mine in Southern California; the 0.72-ct benitoite (left...Century-Old Legacy blue) is from the Dallas Gem Mine area, San Americaās Royal Gems ā Montana and Yogo... State of Maine phires is from the Gem Mountain Mine, GranTantalizing Turquoise ite Country, Montana |  | | Catalog/List | | 94403 U.S.A. Old No. l Headfnme. Whi ā key Hlll Mine, Tuohnne County, CaUfomla (rā -,u. .SVā¢t- tor cr11ā¢tā¢J...association. Few of the minute crystals you see on mine or quarry dumps or even on cabinet specimens will...dumps or surface float. Mirute crystals seen on a mine dump are a clue but nearly always tao weathered...'hite hairs on feldspar. 784 ADAMITE, Moha\'.1k Mine, San Bernardino County, r.alifornia. Group o f colorless...pezohedra in vugs in basalt. ANAPAITE, Lerida Province, Spain. Light green transparent triclinic crystals |  | | Report (volume) | | drainage (table 3-B)_________-_--------_Johnson Creek-Grizzly Gulch area (table 3-C)__________ Ruby Creek drainage...volcanic activity.... 54 Needle Mountains mining district.______________________ Hydrothermal alteration...______---____-_______-_-_____-____._ Beartown mining district.________________N______________ Whitehead Gulch...area________________---_____--.__________________ Beartown mining district._____-_---___-___-__-_--_-____.__---_Noname-Tenmile...59 62 67 72 73 75 77 77 Needle Mountains mining district.______________________________ 90 Description |  | | Journal (article/letter/editorial) | | Elmwood, Tennessee; the mines of the Tri-State district of Missouri-OklaDownloaded by [University of Nebraska...many localities in Colorado, in shades of amber, emerald- or lime-green, black (sometimes referred to as...Localities 1. Portland mine, Ouray County 2. Camp Bird mine, Ouray County 3. Idarado mine, San Miguel County...Bachelor mine, Creede, Mineral County 5. Bulldog mine, Creede, Mineral County 6. Grizzly Bear mine, Ouray...Ouray County 7. Eagle mine, Gilman, Eagle County One of the most common sulfide minerals in Colorado and |  | | Journal (issue) | | of China 14 The Changma Diamond District, Mengyin, Shandong Province, China Peter C. Keller a n d W...FEATURES 41 The Sapphires of Mingxi, Fujian Province, China Alice s. Keller and Peter C. Keller 46...and subsequently visit and . :study the diamond-mining operation at Changma and the sapphire deposits...the gemstone resources of China and the diamond-mining operation at Changma, as well as an introduction...and "The Tourmalines of the Governador Valadares District." Capturing third place was "A Status Report on |  | | Book (edition) | | CITY, UTAH. WRITE FOR PRICES. YOU WANT A GOOD MINE! MANY YEARS EXPERIENCE IN MINl^S AND MINERALS...white to nearly colorless. Beaver Lake District; azurite. 0. K. Mine; bornite, chalcocite, chalcopyrite...limonite, malachite, molybdite, pyrite. Bradshaw District; aragonite, aurichalcite, cerussite, cuprite,...often phosphorescent, wollastonite. Granite District; almandine garnet, barite, bismuth - inite....quartz crystals, prase. Rocky District; Adelia Mine, wulfenite. Star District; azurite, bismuthinite, galena |  | | Journal (article/letter/editorial) | | Rhodochrosite occurs in significant amounts in many mining districts of the Colorado mineral belt, a large...southwestem comer of Colorado. Most of the metal mining in Colorado has been within this belt since the...Sweet Home mine, the 1 1. Urad mine, Clear Creek County 1. Sweet Home mine, Park County Climax mine, the Eagle...Eagle 12. Moose mine, Gilpin County 2. Sunnyside mine, San Juan County mine in Gilman, and var13. Julia...Julia Fiske mine, Leadville, Lake County 3. Mountain Monarch mine, Ouray County 14. John Reed mine, Lake County |  | | Journal (issue) | | Caspi 122 Gem Rhodochrosite from the Sweet Home Mine, Colorado Kimberly Knox and Bryan K. Lees pg. 99...from the Sweet Home mine near Alma, Colorado. Current exploration and minig at this mine, as well as the...have been produced. Currently, mining at the most active area, the Zeus mine, is done underground, with the...gemologists the most important discovery was the large emerald deposit found in the mid1950s at the area called...has brought renewed attention to exploration and mining, with excellent results in terms of both the quantity |  | | Journal (issue) | | change was first observed in a mineral found in the emerald mines at Tokowaia in the Urals (Wƶrth, 1842; Kokscharow...named alexandrite. The colours were described as emerald green in daylight and reddish violet in candlelight...detail the mineral deposits in the Urals. In an emerald green chrysoberyl he found dichroism to be influenced...Sysert, south of Yekaterinburg, associated with emerald, uvarovite, demantoid and a new mineral, chrome...unknown till now deserve attention: a beautiful emerald green chrome mica and a deep green chrome tourmaline |  | | Journal (issue) | | Colored Gemstones World Ruby Forum Large-Scale Mining Update Bitcoin and the Gem Industry Unusual Stones...Gemstones 92 26 World Ruby Forum Large-Scale Mining Update 5 6 12 26 28 32 42 54 58 62 64 68 74...Deposits, Whatās Next? Mining Rubies in Greenland ā The Aappaluttoq Ruby Mine Greenland Ruby ā The Gem...being carefully studied by artisanal small-scale mining (ASM) experts, since they could very well provide...integrity and security along the supply path from mine to market and are already being introduced in the |  | | Journal (article/letter/editorial) | | JanuarylFebruary: Tourmaline on quartz, Cruzeiro mine, Minas Gerais, Brazil. Los Angeles County Museum...Pelt photo. MarcWApril: Beryl and calcite, La Pita mine, Maripi Boyacii, Columbia. Cal Graeber, Leonard...(Herkimer ādiamondsāā), Treasure Mountain Diamond mine, near Little Falls, New York. Uli Bahmann specimen...SepteniberlOctober: Gold, Smuggler Union mine, Telluride district, Colorado. Colorado School of Mines Museum...Calcite, variety manganoan, Argentine vein, Idarado mine, San Miguel County, Colorado. Dave Bunk specimen |  | | Catalog/List | | and 10 inches around the base. He was taken in Zambia several years ago but the mount is in very good...COLLECTION OF TAXIDERMY 48030 GRIZZLY BEAR HALF-BODY MOUNT Ursus arctos This Grizzly Bear was an old bear taken...taken in the northwestern Alaskan range. The Grizzly gets bigger than the Black Bear but not as big as...have a crumpled letter S shape. They are found in Zambia, Mozambique, and southern Tanzania, and are gregarious...Hippotragus equinus equinus This big bull was taken in Zambia just a few years ago. These big antelopes have |  | | Journal (issue) | | T A B L Buyer Beware! Alice S. Keller Marine Mining of Diamonds Off the West Coast of Southern Africa...Stuart Smith Sunstone Labradorite from the Ponderosa Mine, Oregon Christopher L. Johnston, Mickey E. Gunter...developments in underwater mining systems have progressed to the point where mining has commenced in deep...Africa. Dr. Lwinson k professor in 206 Marine Mining of Diamonds ~ ecause the continued diamonds supply...largest producer of diamonds in 1990, t h e Argyle mine in Western Australia (36 million carats), fine gem-quality |  | | Journal (issue) | | blue aquamarine from Nigeria ā¢ Chalcedony chain ā¢ Emerald from Xinjiang, China ā¢ Gold-in-quartz from Mariposa...as his description of dolomite in a Brazilian emerald ābesieged by a swarm of chromite grains.ā Yet also...are seen in hydrogen-rich diamonds from the Argyle mine (Iakoubovskii and Adriaenssens, 2001). The defects...(1969) Mineralogical notes: A study of some gold mine diamonds. American Mineralogist, Vol. 54, Nos. 1ā2...layerā seen on stones with a Lechleitner synthetic emerald overgrowth (see Winter 1992 Lab Notes, pp. 263ā264) |  | | Journal (issue) | | Portland. Oregon 97201 OVERVIEW OF THE BOHEMIA MINING DISTRICT J. J. Gray, Economic Geologist Oregon Department...first, a field trip guide to the Quartzville mining district, appeared in June 1977. The second, printed...Western Cascade mining areas. This article focuses on the major area, the Bohemia mining district; and a field...published in next month's (June) Ore Bin. The Bohemia district was selected for detailed study in the series...series because it is the largest and most productive mining area in the Western Cascades. All facets of Western |
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