Argyle Diamonds Sustainable Development Report 2017 Contents
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ASX Market Announcements Australian Securities Exchange SYDNEY NSW 2000 13 September 2012 Dear Sir, Attached Is a Presentati
120 Collins Street Melbourne 3000 Australia Postal Address: GPO Box 384D Melbourne 3001 Australia T +61 (0) 3 9283 3333 F +61 (0) 3 9283 3707 ASX Market Announcements Australian Securities Exchange SYDNEY NSW 2000 13 September 2012 Dear Sir, Attached is a presentation given by Alan Davies, Chief executive, Rio Tinto Diamonds & Minerals, Bruce Cox, Managing director, Rio Tinto Diamonds, Jean-Francois Turgeon, Managing director, Rio Tinto Iron & Titanium and Xiaoling Liu, President and Chief executive, Rio Tinto Minerals, as part of a financial community visit in Montreal, Canada. Yours faithfully, Stephen Consedine Company Secretary Registered in Australia Rio Tinto Limited 120 Collins Street Melbourne 3000 Australia ABN 96 004 458 404 Rio Tinto Diamonds & Minerals Fuelling consumer-driven economic growth Alan Davies Chief executive 12 September 2012 Cautionary statement This presentation has been prepared by Rio Tinto plc and Rio Tinto Limited (“Rio Tinto”) and consisting of the slides for a presentation concerning Rio Tinto. By reviewing/attending this presentation you agree to be bound by the following conditions. Forward-looking statements This presentation includes forward-looking statements. All statements other than statements of historical facts included in this presentation, including, without limitation, those regarding Rio Tinto’s financial position, business strategy, plans and objectives of management for future operations (including development plans and objectives relating to Rio Tinto’s products, production forecasts and reserve and resource positions), are forward-looking statements. Such forward-looking statements involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Rio Tinto, or industry results, to be materially different from any future results, performance or achievements expressed or implied by such forward- looking statements. -
Spring 1998 Gems & Gemology
VOLUME 34 NO. 1 SPRING 1998 TABLE OF CONTENTS EDITORIAL 1 The Dr. Edward J. Gübelin Most Valuable Article Award FEATURE ARTICLE 4 The Rise to pProminence of the Modern Diamond Cutting Industry in India Menahem Sevdermish, Alan R. Miciak, and Alfred A. Levinson pg. 7 NOTES AND NEW TECHNIQUES 24 Leigha: The Creation of a Three-Dimensional Intarsia Sculpture Arthur Lee Anderson 34 Russian Synthetic Pink Quartz Vladimir S. Balitsky, Irina B. Makhina, Vadim I. Prygov, Anatolii A. Mar’in, Alexandr G. Emel’chenko, Emmanuel Fritsch, Shane F. McClure, Lu Taijing, Dino DeGhionno, John I. Koivula, and James E. Shigley REGULAR FEATURES pg. 30 44 Gem Trade Lab Notes 50 Gem News 64 Gems & Gemology Challenge 66 Book Reviews 68 Gemological Abstracts ABOUT THE COVER: Over the past 30 years, India has emerged as the dominant sup- plier of small cut diamonds for the world market. Today, nearly 70% by weight of the diamonds polished worldwide come from India. The feature article in this issue discuss- es India’s near-monopoly of the cut diamond industry, and reviews India’s impact on the worldwide diamond trade. The availability of an enormous amount of small, low-cost pg. 42 Indian diamonds has recently spawned a growing jewelry manufacturing sector in India. However, the Indian diamond jewelery–making tradition has been around much longer, pg. 46 as shown by the 19th century necklace (39.0 cm long), pendant (4.5 cm high), and bracelet (17.5 cm long) on the cover. The necklace contains 31 table-cut diamond panels, with enamels and freshwater pearls. -
Global Rough Diamond Production Since 1870
GLOBAL ROUGH DIAMOND PRODUCTION SINCE 1870 A. J. A. (Bram) Janse Data for global annual rough diamond production (both carat weight and value) from 1870 to 2005 were compiled and analyzed. Production statistics over this period are given for 27 dia- mond-producing countries, 24 major diamond mines, and eight advanced projects. Historically, global production has seen numerous rises—as new mines were opened—and falls—as wars, political upheavals, and financial crises interfered with mining or drove down demand. Production from Africa (first South Africa, later joined by South-West Africa [Namibia], then West Africa and the Congo) was dominant until the middle of the 20th century. Not until the 1960s did production from non-African sources (first the Soviet Union, then Australia, and now Canada) become impor- tant. Distinctions between carat weight and value affect relative importance to a significant degree. The total global production from antiquity to 2005 is estimated to be 4.5 billion carats valued at US$300 billion, with an average value per carat of $67. For the 1870–2005 period, South Africa ranks first in value and fourth in carat weight, mainly due to its long history of production. Botswana ranks second in value and fifth in carat weight, although its history dates only from 1970. Global production for 2001–2005 is approximately 840 million carats with a total value of $55 billion, for an average value per carat of $65. For this period, USSR/Russia ranks first in weight and second in value, but Botswana is first in value and third in weight, just behind Australia. -
Magnificent Jewels Spring 2013 Sale Highlights a 75.36Ct D/If Type Iia (Ex) Briolette Diamond Pendent Necklace Tops the Sale
PRESS RELEASE | HONG KONG | 7 MAY 2 0 1 3 FOR IMMEDIATE RELEASE MAGNIFICENT JEWELS SPRING 2013 SALE HIGHLIGHTS A 75.36CT D/IF TYPE IIA (EX) BRIOLETTE DIAMOND PENDENT NECKLACE TOPS THE SALE | Magnificent Jewels, Woods Room, May 28, 1:30pm, Sale 3218| Hong Kong – Christie’s Hong Kong will stage its Magnificent Jewels sale on May 28, 2013. Comprising over 290 jewels, the sale is estimated to realize in excess of HK$590 million/US$74 million. Signed pieces from world-class jewelry houses will be presented in the sale. A number of the fine jewels feature distinctive shapes, structures and colour combinations that will attract the attention of collectors with an eye for design. The leading highlight of the sale is a magnificent diamond and coloured diamond pendent necklace. Highlights also extend to an exceptional emerald and diamond necklace, and a ruby and diamond ring. HIGHLIGHTS OF THE SALE With a blend of high-calibre craftsmanship, top-quality stones and unique design characteristics, three masterpieces stand out in this sale. The first, a magnificent diamond and coloured diamond pendent necklace (illustrated right, lot 1706, estimate: HK$66,800,000-98,000,000/US$8,500,000- 12,500,000), has a marquise-cut purplish pink diamond suspending a briolette diamond weighing 75.36 carats, the biggest briolette diamond that has ever appeared in auction. While less than one carat in every 100,000 carats of diamond will be found in a perfect condition, this briolette of imposing size is certified by the Gemological Institute of America (GIA) to be D colour and type IIa, indicating its internally flawless clarity, excellent polish, highest level of chemical purity and exceptional optical transparency. -
Blue Diamond Prices Are on the Rise
This copy is for your personal, non-commercial use only. To order presentation-ready copies for distribution to your colleagues, clients or customers visit http://www.djreprints.com. https://www.barrons.com/articles/blue-diamond-prices-are-on-the-rise-1518037930 Blue Diamond Prices Are on the Rise By Ariel R. Shapiro Feb. 7, 2018 4:12 p.m. ET The fancy color diamond market is on the upswing, according to a report, with blue diamonds seeing the largest gains. Blue diamonds saw a 5.9% increase in value in the fourth quarter of 2017 in a year-over-year comparison, according to data published on Feb. 1 by the Fancy Color Research Foundation (FCRF). Pink and yellow diamond prices decreased slightly in the same period, at 0.8% and 1.8%, respectively. The market overall was up 0.1%. A fancy vivid blue diamond ring (est. $14-18 million) goes on view at Sotheby's on Oct. 13, 2017 in London. ILLUSTRATION: GETTY IMAGES FOR SOTHEBY'S In November 2017, Christie’s sold a 8.67-carat fancy intense blue diamond ring in Geneva, Switzerland for $13.2 million. The reason for this disparity has less to do with demand, than it does with the rarity of the stone, says FCRF Chairman Eden Rachminov. Demand for yellow and pink diamonds is actually higher, but the amount of blue diamonds being mined is decreasing. “Almost nothing is coming out of the ground,” he says. Pink diamonds have seen the highest gains in the last 13 years with an overall appreciation of 361.9%, according to FCRF’s index, which is compiled through survey data provided by manufacturers and brokers. -
Ecological Comparison of Synthetic Versus Mined Diamonds
Ecological Comparison of Synthetic versus Mined Diamonds Saleem H. Ali Working Paper, Institute for Environmental Diplomacy and Security University of Vermont, January, 2011 http://www.uvm.edu/ieds Abstract The energy usage and emissions in mined versus lab-created diamonds was evaluated, based on industrial data, since these two factors are often a general indicator of environmental impact that can be useful in product comparisons. Depending on the process and the location of the mine, the data can be highly divergent and cannot be used as a singular measure of environmental impact. There is a need to develop life cycle analysis techniques from industrial ecology to conduct a detailed comparison of synthetic versus mined stones. Introduction Synthetic diamonds have come of age, and the year 2010 will be remembered as a landmark year in this regard since for the first time labs of the Gemological Institute of America (GIA) in New York were able to grade a gem quality near-colorless synthetic diamond (formed by chemical vapor deposition) , greater than 1 carat. The history of synthetic diamonds at the industrial level, goes back to patents for super-abrasives at General Electric can be traced back to several decades (Hazen, 1996). However, gem quality synthetic diamonds have only risen to prominence in the last decade with the rise of a few key companies who are taking on this growing market in concert with boutique jewelry brands. As jewelers consider environmental social responsibility more seriously in marketing their gemstone products, energy usage in mined versus lab-created gems can be an important factor in determining comparative environmental impact. -
The World of Pink Diamonds and Identifying Them
GEMOLOGY GEMOLOGY as to what dealers can do to spot them using standard, geologists from Ashton Joint Venture found certain indicator The World of Pink Diamonds inexpensive instruments. The commercial signifcance of minerals (such as ilmenite, chromite, chrome diopside, the various types will also be touched on. and pyrope garnet) in stream-gravel concentrates which indicated the presence of diamond-bearing host rocks. and Identifying Them Impact of Auction Sales Lamproites are special ultrapotassic magnesium-rich In the late 1980s, the public perception surrounding fancy- mantle-derived volcanic rocks with low CaO, Al2O3, Na2O colored diamonds began to change when the 0.95-carat and high K2O. Leucite, glass, K-richterite, K-feldspar and Cr- By Branko Deljanin, Dr Adolf Peretti, ‘Hancock Red’ from Brazil was sold for almost $1 million per spinel are unique to lamproites and are not associated with and Matthias Alessandri carat at a Christie’s auction. This stone was studied by one kimberlites. The diamonds in lamproites are considered to be of the authors (Dr. Adolf Peretti) at that time. Since then, xenocrysts and derived from parts of the lithospheric mantle Dr. Peretti has documented the extreme impact this one that lies above the regions of lamproite genesis. Kimberlites sale has had on subsequent prices and the corresponding are also magmatic rocks but have a different composition recognition of fancy diamonds as a desirable asset class. The and could contain non-Argyle origin pink diamonds. demand for rare colors increased and the media began to play a more active role in showcasing new and previously Impact of Mining Activities unknown such stones. -
Beryllium Diffusion of Ruby and Sapphire John L
VOLUME XXXIX SUMMER 2003 Featuring: Beryllium Diffusion of Rubies and Sapphires Seven Rare Gem Diamonds THE QUARTERLY JOURNAL OF THE GEMOLOGICAL INSTITUTE OF AMERICA Summer 2003 VOLUME 39, NO. 2 EDITORIAL _____________ 83 “Disclose or Be Disclosed” William E. Boyajian FEATURE ARTICLE _____________ pg. 130 84 Beryllium Diffusion of Ruby and Sapphire John L. Emmett, Kenneth Scarratt, Shane F. McClure, Thomas Moses, Troy R. Douthit, Richard Hughes, Steven Novak, James E. Shigley, Wuyi Wang, Owen Bordelon, and Robert E. Kane An in-depth report on the process and characteristics of beryllium diffusion into corundum. Examination of hundreds of Be-diffused sapphires revealed that, in many instances, standard gemological tests can help identify these treated corundums. NOTES AND NEW TECHNIQUES _______ 136 An Important Exhibition of Seven Rare Gem Diamonds John M. King and James E. Shigley A look at the background and some gemological observations of seven important diamonds on display at the Smithsonian Institution from June to September 2003, in an exhibit titled “The Splendor of Diamonds.” pg. 137 REGULAR FEATURES _____________________ 144 Lab Notes • Vanadium-bearing chrysoberyl • Brown-yellow diamonds with an “amber center” • Color-change grossular-andradite from Mali • Glass imitation of tsavorite • Glass “planetarium” • Guatemalan jade with lawsonite inclusions • Chatoyant play-of-color opal • Imitation pearls with iridescent appearance • Sapphire/synthetic color-change sapphire doublets • Unusual “red” spinel • Diffusion-treated tanzanite? -
Investing in Colored Diamonds from Diamond Investment Dealers
BENEFITS OF INVESTING IN COLORED DIAMONDS FROM DIAMOND INVESTMENT DEALERS When investing in diamonds you need an ad- ly appreciated in value. Over the last decade, visor who has the depth and breadth of knowl- Argyle pink diamonds have consistently bro- edge in investment grade diamonds. Rare ken records on the global auction market, Diamond Investor provides seamless access demonstrating the robust nature of the dia- for savvy investors. We focus exclusively on mond market and the unceasing international natural fancy-colored diamonds and are staffed demand. Christies auctions have surpassed by experts in every facet of the diamond mar- records the last few years for both the most ket. This level of experience and expertise not expensive investment grade diamonds and only gives us greater understanding of the di- the highest price per carat. In April 2014, Chris- amond market, but also gives us access to a ties auctioned top quality, fancy pink, blue professional global network of investors, col- and yellow diamonds with prices exceeding of lectors and industry specialists including the $1 to $2 million per carat, leading Christies most sought after gemologists and diamond to declare 2014 the year of the colored dia- cutters in the world. mond. Rahul Kadakia, Head of Christies New York, states, At a time when other investments have suf- fered unparalleled chaos and uncertainty, “A colorless D-grade diamond at auction will make about $150,000 a carat, while a pink natural fancy-colored diamonds have steadi- fancy-colored diamond will make $1.5 million a carat, 10 times the price.” He also stated, “This is where the market is. -
Hong Kong Tatler May 2016
STYLE | JEWELLERY Diamond secret watch with 33.37-carat carved tourmaline by Graff hen the surrealist its soft, muted tones, the larger pieces are designer Elsa extremely eye-catching. Schiaparelli saw the Another lovely gemstone is the peachy 17-carat vivid pink pink morganite, discovered in 1911 and diamond her glamorous named by Tiffany & Co gemmologist George client Daisy Fellowes was Kunz after the banker JP Morgan, who was wearing, she described its also a gem collector. It’s the pink translucent colour and size as “shocking.” And in 1937, variety of beryl, which includes aquamarine, when Schiaparelli created the Shoe Hat green beryl and emerald. Colour and clarity for Fellowes, the magenta of its heel was are the most important considerations, and described as “hot” for all the attention it expect to pay prices similar to those for attracted. Thanks to these two women, we quality aquamarine. Extremely feminine and have two fabulous descriptions for a flirty, pretty, morganite looks gorgeous set in rose sexy, racy pink—and what gorgeous gems gold and is perfect for brides. Add some pink there are to be deserving of such adjectives. pearls in an individual design and you have Hot-pink rubellite tourmaline is the perfect jewellery you’ll enjoy wearing long after the gemstone for women who like to stand out wedding day. in a crowd. Large, good-quality rubellites Vivid pink diamonds may be setting with no visible natural impurities (what the auction records, but exceptional stones industry calls inclusions) have a high value weighing more than three carats are very and are becoming rarer on the market, so hard to find. -
Australian Diamond Deposits, Kimberlites, and Related Rocks Known Diamondiferous Fields and Locations on the 1:5 000 000 Scale Map, Geoscience Australia, Canberra
50 120` 51 126`52 132` 53 138` 54 144` 55 150` 8` 8` TO TIMOR SEA RRES STRAIT NORTH KIMBERLEY FIELD 114` MERLIN FIELD MERLIN FIELD Fohn 1 TORRES STRAIT SC Emu 1, 2 Gareth, Kay Bedevere Ector Ywain, Tristram, Gawain ARNHEM Palomides, Sacramore, Maningrida Launfal, Excalibur SC Milingimbi Nhulunbuy DARWIN Weipa PINE CREEK 12` 12` AustralianAustralian DiamondDiamond Deposits,Deposits, Joseph Daly RIver Pine Creek Stow 1 Mining operations at Ellendale, West Kimberley, W.A. Bonaparte (Photo courtesy of Kimberley Diamond Company NL). Kimberlites,Kimberlites, andand RelatedRelated RocksRocks Gulf LITCHFIELD McARTHUR Numbulwar COR Katherine AL Gulf Ashmore Piipes SEA Scale 1:5000000 Ngukurr Seppellt Piipes Roper Kimberley of 0 90 180 270 360 450 Kilometers North K COEN LAMBERT CONFORMAL CONIC PROJECTION Carpenteria SD Central Meridian : 134`E Stand Parallels : 18`S, 36`S Timber Creek Kowanyama SD Geocentric Datum of Australia 1994 Wyndham KIMBERLEY Kununurra Cooktown VICTORIA RIVER Argyle Mine Abner Range Emu Bow River Alluvials Maude Creek Kim 6, 14, 13 Ellendale 17 Napier 2, 3 ke Creek Merlin Mossman Carpenter Gap Ariies Smoke El 26 17, 12, 16 Kim 3 El 427BW, 27BE Palomides Gareth El 25 El 18, 18b Napier 1 ips Range HALLS Sacramore Launfal North CAIRNS Mt North Phillip Launfal El 41, 42, 43 El 19 Ellendale 46 CREEK Cairns Prima 3 KING LEOPOLD Elliott Prima 2 berley Karumba 16` El 44, 24 5 El 40 Kimberley 21, 23, El 36 East Kimb MURPHY 16` 27 El 21, 21A Atherton El 37 Kim 10 El 16 Derby pring Coanjula Burketown Normanton 4 El 9 Ellendale 39 Big Sp 9 Kim 25 El 8 Ellendale 9 Kim 7, 8 El 22 11 El 13 Kimberley 29, 19 Kimberley 28, 34, El 11 Diamonds from Ellendale 9, West Kimberley, W.A. -
Olympia Diamond Collection Olympia Diamond Collection
Olympia Diamond Collection Olympia Diamond Collection GIA Monograph | The Olympia Diamond Collection Olympia Diamond Collection Introduction..........................................................................................................................................................................1 The.Manufacture.of.the.Olympia.Diamonds.................................................................................................................4 Color.Grading.the.Olympia.Diamond.Collection.......................................................................................................7 Clarity.Grading.and.Microscopic.Examination..........................................................................................................10 Analysis.of.Atomic-Level.Characteristics.....................................................................................................................15 Summary............................................................................................................................................................................. 23 GIA.Color.Grade:.Fancy.Vivid.Purplish.Pink. GIA.Clarity.Grade:.SI1 Cut:.Cut-Cornered.Square.Modified.Brilliant Weight:.2.17.carats GIA.Color.Grade:.Fancy.Vivid.Orange. GIA.Clarity.Grade:.VS1 Cut:.Cut-Cornered.Rectangular.Modified.Brilliant Weight:.2.34.carats GIA.Color.Grade:.Fancy.Vivid.Orangy.Yellow. GIA.Clarity.Grade:.I1 Cut:.Cut-Cornered.Rectangular.Modified.Brilliant Weight:.1.01.carats GIA.Color.Grade:.Fancy.Vivid.Blue. GIA.Clarity.Grade:.VS1