 | | Journal (issue) | | Shepherd, CH. Winter Branch Chairmen: Midlands - G.M. Green, North West - I. Knight, Scottish - B. Jackson Examiners:...grossulars from E. Africa and Pakistan and its bright green colour is attributed mainly to vanadium. 391 389...displays hues ranging from a pale yellowish-green to a dark green. It is surrounded by an assemblage including...properties have been determined for a relatively dark green specimen of garnet 28 mm in length (largest piece...1992). Chemically also it is comparable to the green garnets from East Africa, in particular Kenyan, |  | | Journal (issue) | | Six-Rayed Star Enstatite from Madagascar | Yellowish Green Enstatite (and Star Enstatite) from Tanzania | Sunstone...Stefanos Karampelas, Bahrain Institute for Pearls & Gemstones (DANAT), Manama; Lore Kiefert, Gübelin Gem Lab...Research Council's Excellence in Research for Australia (ERA) Journal List; China National Knowledge Infrastructure...United ID customers. Visit www.uid-ramanlab.com/ gemstones. THE JOURNAL OF GEMMOLOGY, 36(8), 2019 679 ...testing procedure to gemstones and biogenic materials’, ‘Multi-element analysis of gemstones for country of |  | | Book (edition) | | 978-0-7198-0431-1 NAG Press Clerkenwell House . Clerkenwell Green London EC1R OHT NAG Press is an imprint of Robert...Lesson 1 Introduction Lesson 2 The Chemistry of Gemstones 13 Lesson 3 Crystallography 31 Lesson 4 ...Primary Gem Species 170 Lesson 12 Synthetic Gemstones 205 Lesson 13 Simulants 234 Lesson 14 Composite...covered the key properties of the curriculum gemstones as it enhances understanding of the individual...own chapter, are in one chapter, and inorganic gemstones are divided into Primary Gem Species, the principal |  | | Journal (issue) | | Karl Schmetzer San Diego, California Canberra, Australia Petershausen, Germany Edward W. Boehm A.J.A...Janse Andy Shen Chattanooga, Tennessee Perth, Australia Wuhan, China James E. Butler Mary L. Johnson...Otter Wuyi Wang Carlsbad, California Canberra, Australia New York, New York Gaston Giuliani Aaron Palke...Micro-World section explores the inner landscapes of gemstones, offering a glimpse into Earth’s natural forces...including two high-quality diamonds with noteworthy green chromium-colored diopside and purplish pink pyrope |  | | Journal (issue) | | (Bram) Janse Nathan Renfro Tokyo, Japan Perth, Australia Carlsbad, California Timothy Adams E. Alan... Welbourn Prague, Czech Republic Brisbane, Australia Reading, UK gia.edu/gems-gemology Subscriptions...• Black star sapphire filled with lead glass • Green lead glass–filled sapphire rough • Large crystal...synthetic melee with natural diamonds • Treated red and green HPHT synthetic diamonds 310 G&G Micro-World Andradite...characterization of the material, which occurs as bluish green to greenish blue crystals measuring up to 15 centimeters |  | | Journal (issue) | | by prosopite and cookeite, the the latter by in green samples, while the needles occur occur in in the...blue ones. INTRODUCTION A great number of minerals show the chatoyancy effect effect when a multitude of... 183 FIG. 1. Tourmaline chatoyancy: Sample 1. Green-yellowish tourmaline from Minas Gerais (Brazil)...Tourmaline chatoyancy: Sample 14. Green tourmaline from Himalaya mine, Pala (U.S.A.). Cat's-eye streak...FIG. 3. Tourmaline chatoyancy: Sample 5. Light-green tourmaline from Pala, San Diego (U.S.A.). The various |  | | Journal (issue) | | Aquamarine with Spodumene Inclusions from the Oceanview Mine, California, USA | Demantoid/ Andradite Slices from...Properties of Green Fluorite from England Showing Daylight Fluorescence | Jewellery Set with Green Fluorite...Somaliland | Laurentthomasite, a New Gem Mineral | Green Orthoclase with Chatoyancy from Vietnam | Faceted...piece incorporates the natural amber textures to show an autumn scene outside Hanshan Temple, where a...Stefanos Karampelas Bahrain Institute for Pearls & Gemstones (DANAT), Manama Alan T. Collins King’s College |  | | Book | | 1 The Green Legend 1 2 The Birth of the Stone in Myth and in Rock 9 3 From Mine to “Mine”: The...killed for them. This is their story too. r The Green Legend The very first emerald in the universe belonged...earthly creation, sister to the verdant land and green-shining sea. It’s here on Earth that it began its...the Sanskrit word marakata, which simply means “green stone.” It’s a stretch, but there it is. The ancient...Egyptian term mafek-en-ma likewise refers simply to a green stone, and was used to describe peridot, malachite |  | | Book (edition) | | common minerals. On these text pages are entries in green (hot) text that provide instant, clickable linkages...but are in full color in the PowerPoint images. Gemstones taken from color Plates IX through XII in the...many years of field seasons to Canada, Western Australia, South Africa, and Brazil. He was awarded a =...Guggenheim Fellowship (for field research in Western Australia) in 1978; he etiived the Carnegie Mineralogical...Growth 568 Hydrothermal Growth 568 Treatment of Gemstones 569 Dyeing 569 Heat Treatment 569 Irradiation |  | | Book | | The highway followed a river that flowed past green farm fields. Soon, they were winding up a steep...amounts of halite around the world. Today, people mine it from underground. Halite is used to melt ice...Sulfur is always yellow, and malachite can only be green. So, color helps Sulfur identify them. However,...corundum may be bright blue or red. These are the gemstones known as sapphires and rubies. The mineral azurite...always red. Malachite’s streak (right) is always green. 19 Breaking Minerals Scientists also study how |  | | Book (edition) | | References and Suggested Reading 557 Treatment of Gemstones Beryl 14. Mineral Assemblages: Introduction to...familiar, but also com- terials including valuable gemstones such as emer- synthetic equivalents of many naturally...in the Nile Valley executed nearly 5000 years ago show busy artificers weighing malachite and precious...three-dimensional crystalline structures. These images show that many minerals tration, which is a requirement...The sections across the direction of elongation show identical interfacial angles of 120° in both, irrespective |  | | Journal (issue) | | Nineteen, Number Three Articles The Tonopah-Belmont mine, Maricopa County, A rizona by G. B. Allen & W. Hunt...........221 COVER: ANGLESITE from the Touissit mine, Morocco. The large crystal measures 4.5 cm. This...specimens stolen from Victor Yount during the Tucson Show this year; see "W hat's New in Minerals?" Photo...complete copies by air freight just prior to the Tucson Show this year, and sold most of them during the course...featured mineral of the 35th Tucson Gem and Mineral Show. Papers are invited on topics in any way related |  | | Book (edition) | | or pale flesh-red two smooth surfaces of or which show one as the quartz, but fracture; Then these are...Mineralogy restricted, for anything that was dug from a mine was called a single substances but mixtures Most...de\'elopment. and sapphires that, when cut into gemstones, are not impossible to distinguish from natural...the conclusion that may readily be deceived. show him at a glance whether a mineral has the regular...regular geometrical shape of a crystal. It will show him also whether the mineral has the natural, easy, trained |  | | Book (volume) | | associated with water-quality control, such as acid- mine drainage, can be minimized by selective replacement...approximately to the original terrain is flat the mine mining method or only are similar is yvored...from the general requirement that all disturbed mine areas be returned to their approximate original...hironis, Blast casting succeeds at multi-seam western mine, Coal Age, November 1985) m) highwall. Side nches...coal-loading truck shovel team Fig. 3. Open-pit lignite mine. (After D. Jackson and L. Smith, New horizon looms |
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