Alex Meneses Gets Serious About Jewelry Origin of Pink Diamonds Firm Profile James Alger, James Alger Co
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Magnetite and Hematite Intheiron Ores of the Kiruna Type and Some Other Iron Ore Types
SERIE C NR 625 AVHANDLINGAR OCH UPPSATSER ARSBOK 6 1 NR 10 RUDYARD FRIETSCH THE RELATIONSHIP BETWEEN MAGNETITE AND HEMATITE INTHEIRON ORES OF THE KIRUNA TYPE AND SOME OTHER IRON ORE TYPES STOCKHOLM 1967 SVERIGES GEOLOGISKA UNDERSOKNING SERIE C NR 625 ARSBOK 61 NR 10 RUDYARD FKIETSCH THE RELATIONSHIP BETWEEN MAGNETITE AND HEMATITE IN THE IRON ORES OF THE KIRUNA TYPE AND SOME OTHER IRON ORE TYPES STOCKHOLM 1967 Manuscript received May 8th, 1967 Editor: Per H. Lundegårdh Stockholm 1967 Kungl. Boktryckeriet P. A. Norstedt & Söner CONTENTS Abstracc ................................. Introdiiction ................................ The relationship between magnetite and hernatite in kon ores of the Kiruna type ... Northern Sweden ............................ Central Sweden ............................ Chile .................................. Mexico ................................. United States ............................. The formation of'hematite in iron ores of the Kiruna type ............ Examples of the occurrence of hematite in connection with metasomalic processes ... The relationship between magnetite and hematite in ~henon-apatitic irvri ores of Central Sweden .................................. Conclusions ................................ Acknowledgements ............................. References ................................. 7 1.670383 . SGU. Frietsch ABSTRACT I11 the magmatic iron ores of thc Kiruna type the primary iron oxide is inostly magnetite. Hematite is rather common and except when clue to superficial weathering is a later metasomatic alteration of the magnetite. The alteration in the wall-rock (and to a less exteiit in the orc) has given rise to new minerals, e. g. quarte, muscovite, chlorite, calcite, clay minerals and small amounts of tourmaline, fluoritc, barite, allanite and zircoii. It is a later phase of the main ore- forming process. The tcmpcraturc at which the alteration took place is, on account of the niiner- al paragenesis in the altered wall-rock, believed to have been moderate tc. -
Rhodochrosite Gems Unstable Colouration of Padparadscha-Like
Volume 36 / No. 4 / 2018 Effect of Blue Fluorescence on the Colour Appearance of Diamonds Rhodochrosite Gems The Hope Diamond Unstable Colouration of in London Padparadscha-like Sapphires Volume 36 / No. 4 / 2018 Cover photo: Rhodochrosite is prized as both mineral specimens and faceted stones, which are represented here by ‘The Snail’ (5.5 × 8.6 cm, COLUMNS from N’Chwaning, South Africa) and a 40.14 ct square-cut gemstone from the Sweet Home mine, Colorado, USA. For more on rhodochrosite, see What’s New 275 the article on pp. 332–345 of this issue. Specimens courtesy of Bill Larson J-Smart | SciAps Handheld (Pala International/The Collector, Fallbrook, California, USA); photo by LIBS Unit | SYNTHdetect XL | Ben DeCamp. Bursztynisko, The Amber Magazine | CIBJO 2018 Special Reports | De Beers Diamond ARTICLES Insight Report 2018 | Diamonds — Source to Use 2018 The Effect of Blue Fluorescence on the Colour 298 Proceedings | Gem Testing Appearance of Round-Brilliant-Cut Diamonds Laboratory (Jaipur, India) By Marleen Bouman, Ans Anthonis, John Chapman, Newsletter | IMA List of Gem Stefan Smans and Katrien De Corte Materials Updated | Journal of Jewellery Research | ‘The Curse Out of the Blue: The Hope Diamond in London 316 of the Hope Diamond’ Podcast | By Jack M. Ogden New Diamond Museum in Antwerp Rhodochrosite Gems: Properties and Provenance 332 278 By J. C. (Hanco) Zwaan, Regina Mertz-Kraus, Nathan D. Renfro, Shane F. McClure and Brendan M. Laurs Unstable Colouration of Padparadscha-like Sapphires 346 By Michael S. Krzemnicki, Alexander Klumb and Judith Braun 323 333 © DIVA, Antwerp Home of Diamonds Gem Notes 280 W. -
Tourmaline Announces Formation of Topaz Energy, Unlocking Value in Tourmaline's Significant Asset Base
NOT FOR DISTRIBUTION IN THE UNITED STATES OR DISSEMINATION OVER UNITED STATES NEWSWIRE SERVICES. NEWS RELEASE OCTOBER 10, 2019 TOURMALINE ANNOUNCES FORMATION OF TOPAZ ENERGY, UNLOCKING VALUE IN TOURMALINE'S SIGNIFICANT ASSET BASE Calgary, Alberta - Tourmaline Oil Corp. (TSX:TOU) ("Tourmaline") is pleased to announce the formation of Topaz Energy Corp. (“Topaz”), a new private royalty and infrastructure energy company. Tourmaline will sell to Topaz: a royalty interest on Tourmaline lands, a non-operated interest in two of Tourmaline‘s existing 19 natural gas processing plants, and a contracted interest in a portion of Tourmaline‘s current third-party revenue for total cash and share consideration of $775 million. Topaz will be a low-risk, high-distribution, hybrid royalty and infrastructure energy company with long-term growth plans. Topaz will be capitalized initially with a $150 to $200 million third-party equity private placement, with Tourmaline retaining a 75% to 81% equity ownership interest. Tourmaline intends to reduce a portion of its ownership as Topaz participates in future acquisition activities and an anticipated Topaz public liquidity event in 2020. The initial acquisition from Tourmaline is expected to generate approximately $90 million in revenue(1) in 2020, of which it is anticipated approximately 75% will be paid out in quarterly dividends ($0.80 per share annually, 8% yield). The assets to be acquired from Tourmaline will consist of three components: 1. A gross overriding royalty (“GORR”) on natural gas, oil, and condensate production on 100% of Tourmaline’s existing lands (approximately 2.2 million net acres). 2. A non-operated 45% working interest in two natural gas processing plants underpinned by long-term take- or-pay commitments from Tourmaline. -
Red Glass for the Pharaoh Thilo Rehren
. ARCHAEOLOGY INTERNATIONAL HildO<heim, Genn•ny) '' excmting '� Red glass for the Pharaoh industrial estate dating to the foundatio period of the new city, including the larg-� I Thilo Rehren est known bronze foundries of antiquity,1 Glass in ancient Egypt appears to have been used as a substitute military workshops supplying and main for precious stones that were not available in the country. Here taining the pharaoh's chariotry including the process of glass manufacture is traced through the examina stables for hundreds of horses, and the only known production site for glass in tion of the fr agmentaryremains of ceramic reaction vessels and Bronze Age Egypt and Mesopotamia. The crucibles used in the production of small glass ingots. excavations date back to the 1980s, but only in the past couple of years have we been able to identify the glassmaking evi n archaeological terms, glass is a these precious materials, and ancient Egypt dence, although much of it had been exca relatively young material that was is no exception to this rule. It was famous vated many years previously. Why this invented much later than pottery or for its riches in gold, but had no silver ores; delay? Because we didn't know how to rec Imetals; only from the beginning of it produced amethyst, carnelian and tur ognize glassmaking: there being no prece the Late Bronze Age onwards do we quoise, but not lapis lazuli, amber or ob dent or template to follow when looking have good evidence for its intentional and sidian. Should the country's rulers there for Bronze Age glassmaking, and the evi routine production. -
March 2019 Agate Explorer.Pub
Cuyuna Rock, Gem and Mineral Society The Agate Explorer March 2019 Summer Field Trip Plans are being made for a long weekend trip to Thunder Bay to collect amethyst. The tentative dates are Friday -Sunday, July 5 -7. A sign -up sheet will be available at upcoming meeting in order to plan this trip. It is necessary to have a passport to travel to Canada. You may also check to see if an enhanced driver’s license is acceptable. March meeting Open Shop from 9 a.m. —noon Franklin Art Center Club member, Ray Strassberg, will be available for members to learn how Club Information to cut rocks using the 10” or 16” inch saws. Website -www.cuyunarockclub.org - Email [email protected] Bring rocks of your own or purchase something in the Rock Room. Meeting Place Lower level Franklin Arts Center Kids’ Program 1001 Kingwood St, Brainerd, MN 56401 Did you know that there are many Directions .4 mile east of Business Hwy. 371 different kinds of Lake Superior & Hwy. 210 intersection. agates? Lisa will tell you all about it (Castle turret water tower.) at the March meeting! Date/Time the 2nd Saturday of each month Rock Wrappers at 2 p.m. unless otherwise noted. Meets starting at 10 a.m. on meeting Saturdays. Club Dues $20/ family ,An open gathering for wire wrappers. Hang out with other wrappers, Free /unaccompanied juniors and work on your projects. (Bring all supplies needed.) Membership runs Learn tricks to make wrapping easier, a new design, from Jan. 1-Dec. 31st. or perhaps a new place to find supplies. -
Preliminary Investigation of Purple Garnet from a New Deposit in Mozambique
GIT GEMSTONE UPDATE Preliminary Investigation of Purple Garnet from a New Deposit in Mozambique By GIT-Gem testing laboratory 11 May 2016 Introduction In March 2016, a group of Thai gem dealer led by Mr. Pichit Nilprapaporn paid a visit to the GIT and informed us about a new garnet deposit in Mozambique, that was discovered near the western border with Zimbabwe. They also displayed a large parcel of rough and a few cut stones claimed to be the material found in this new deposit (Figure 1). According to the stone’s owner, these garnet specimens were unearthed from an unconsolidated sediment layer, just a few meters below ground surface. This brief report is our preliminary investigation on the interesting vivid purple garnet from the new deposit in Mozambique. Figure 1: Mr. Pichit Nilprapaporn (center), the stone’s owner, showing a large parcel of purple gar- net roughs claimed to be from a new deposit in Mozambique to the GIT director (left). The Gem and Jewelry Institute of Thailand (Public Organization) 140, 140/1-3, 140/5 ITF-Tower Building. 1st - 4th and 6th Floor,Silom Road, Suriyawong, Bangrak, Bangkok 10500 Thailand Tel: +66 2634 4999 Fax: +66 2634 4970; Web: http://www.git.or.th; E-mail: [email protected] 11 May, 2016 Preliminary Investigation of Purple Garnet from a New Deposit in Mozambique 2 Samples and Testing Procedure The stone’s owners donated some specimens (one 6.10 ct oval-facetted stone and 13 rough samples weighing from 3.83 to 9.43 cts) to the GIT Gem Testing Laboratory for studying. -
The Good Germans the Hemmerles, Munich’S First Family of Jewelry, Design Baubles That Are Truly One of a Kind
Clockwise from left: Chris- tian and Stefan Hemmerle at home; Hemmerle’s 18k white gold, black iron and aquamarine ring, 18k red gold, moonstone, amethyst and sapphire brooch, and 18k white gold, red patinated copper, spinel and amethyst earrings, prices available upon request, at Hemmerle, 011.800.2422.6000. ccessories ∂lash ccessories a W The Good Germans The Hemmerles, Munich’s first family of jewelry, design baubles that are truly one of a kind. Photographs by S t e f a n K o r t e t’s not every client request that 230 pieces of haute joaillerie each year in its inspires a designer to branch off into a 12-artisan Munich workshop, is renowned direction he never before imagined— for its austere architectural settings ren- I and subsequently to develop an entirely dered in unorthodox materials including new style in doing so. But that’s exactly how copper, stainless steel, brass, aluminum and the German jewelry house Hemmerle came rare woods, and for its use of exquisitely to enjoy its current status as one of today’s cut colored gemstones. The heaviness of most inventive and sought-after jewelers. a masculine charcoal-hued iron band, for It all began in 1995, when a prominent instance, only enhances the sharp angles of Munich art collector commissioned Ste- an emerald-cut 40-carat electric blue aqua- fan Hemmerle, a third-generation jeweler, marine ring, while the warm hues of orange to create a birthday present for his wife, a and red patinated copper perfectly com- woman who detested flashy gems. -
Phenomenal Gemstones Possess Striking Optical Effects, Making Them Truly a Sight for Sore Eyes
THE PHENOMENAL PROPERTIES OF GEMS Phenomenal gemstones possess striking optical effects, making them truly a sight for sore eyes. Here is GIA’s guide to understanding what makes each phenomenon so uniquely brilliant. ASTERISM CROSSING BANDS OF REFLECTED LIGHT CREATE A SIX-RAYED STAR-LIKE APPEARANCE. ASTERISM OCCURS IN THE DOME OF A CABOCHON, AND CAN BE SEEN IN GEMS LIKE RUBIES AND SAPPHIRES. ADULARESCENCE THE SAME SCATTERING OF LIGHT THAT MAKES THE SKY BLUE CREATES A MILKY, BLUISH-WHITE GLOW, LIKE MOONLIGHT SHINING THROUGH A VEIL OF CLOUDS. MOONSTONE IS THE ONLY GEM THAT DISPLAYS IT. AVENTURESCENCE FOUND IN NATURAL GEMS LIKE SUNSTONE FELDSPAR AND AVENTURINE QUARTZ, IT DISPLAYS A GLITTERY EFFECT CAUSED BY LIGHT REFLECTING FROM SMALL, FLAT INCLUSIONS. CHATOYANCY OTHERWISE KNOWN AS THE “CAT’S EYE” EFFECT, BANDS OF LIGHT ARE CAUSED BY THE REFLECTION OF LIGHT FROM MANY PARALLEL, NEEDLE-LIKE INCLUSIONS INSIDE A CABOCHON. NOTABLE GEMS THAT DISPLAY CHATOYANCY INCLUDE CAT’S EYE TOURMALINE AND CAT’S EYE CHRYSOBERYL. IRIDESCENCE ALSO SEEN IN SOAP BUBBLES AND OIL SLICKS, IT’S A RAINBOW EFFECT THAT IS CREATED WHEN LIGHT IS BROKEN UP INTO DIFFERENT COLORS. LOOK FOR IT IN FIRE AGATE AND OPAL AMMONITE (KNOWN BY THE TRADE AS AMMOLITE). LABR ADORESCENCE A BROAD FLASH OF COLOR THAT APPEARS IN LABRADORITE FELDSPAR, IT’S CAUSED BY LIGHT INTERACTING WITH THIN LAYERS IN THE STONE, AND DISAPPEARS WHEN THE GEM IS MOVED. INSIDER’S TIP: THE MOST COMMON PHENOMENAL COLOR IN LABRADORITE IS BLUE. PLAY OF COLOR THE FLASHING RAINBOW-LIKE COLORS IN OPAL THAT FLASH AT YOU AS YOU TURN THE STONE OR MOVE AROUND IT. -
Get Reactive in System 96!
Get Reactive in System 96! Uroboros has created two unique glass formulas for System 96 that are designed to create an interface color, or a reac on, when melted against certain other colors. This occurs when ions from the two adjacent glasses migrate and mingle when the gl asses become hot and ß uid. Given the right glass chemistry, the comingled ions form a very thin colored line, or reac on. Since our formulas react to create a no ceably reddish hue we named them Red Reac ves: as in Red Reac ve Transparent, and Red Reac ve Opal. The primary ingredient needed in a glass to generate a reac on color with our Reac ve glass is Copper. Copper is present in many blue and blue-green glass colors, but in some cases in too low a concentra on to create a no ceable reac on. For simplicity, all System 96 colors have been graded for their poten al to react into three categories: Strong, Medium, and Mild. See them all listed in the chart on the back of this page. You will Þ nd that the intensity of the reac on color will get stronger with longer, ho er, or repeat Þ rings. This is because the copper ions have more me to mingle with their friendly reac ve partners in the adjacent glass. The chart rankings are based on a typical single Þ ring cycle. You could get a Medium reac on from a color graded as Mild by Þ ring it ho er, or Þ ring mul ple mes. -
Thomas, R., Rericha, A., Pohl, WL, Davidson, P
Originally published as: Thomas, R., Rericha, A., Pohl, W. L., Davidson, P. (2018): Genetic significance of the 867 cm−1 out-of- plane Raman mode in graphite associated with V-bearing green grossular. - Mineralogy and Petrology, 112, 5, pp. 633—645. DOI: http://doi.org/10.1007/s00710-018-0563-1 1 Genetic significance of the 867 cm-1 out-of-plane Raman mode in graphite associated with V-bearing green grossular Rainer Thomasa Adolf Rerichab Walter L. Pohlc Paul Davidsond Paul Davidson [email protected] 0000-0002-6129-0748 a Helmholtz-Centre Potsdam, German Research Centre for Geoscience – GFZ, Section 4.3. Chemistry and Physics of Earth Materials, Telegrafenberg, D-14473 Potsdam, Germany b Alemannenstr. 4a, D-14612 Falkensee, Germany c Austrian Academy of Sciences, Dr. Ignaz Seipel-Platz 2, 1010 Vienna, Austria d ARC Centre of Excellence in Ore Deposits, University of Tasmania, Hobart 7001, Australia Keywords: Tsavorite Green V-grossular Graphite Raman scattering Fluid and melt inclusions Sulfur 2 Abstract SE Kenya is the world’s largest producer of green vanadium grossular gemstones (tsavorite). Samples from one of the mines near Mwatate, and of occurrences in Tanzania yielded remarkable new insights into the genesis of tsavorite. Graphite is intimately associated with V-grossular and is one of the keys to understanding its origin. In the course of this study we found five different types of graphite. Surprisingly, in one graphite type the “Raman- forbidden” and IR-active 867 cm-1 band was observed. In this communication, we attempt to find an explanation for this unusual phenomenon. -
Men's Collection
Men’s Collection 1 Lovers’ Rings A romantic pair of rings featuring GIA Certified Natural Fancy Dark Orangy Brown Diamonds. Smaller natural color diamonds form half a heart on each side crossing on the inside of the shank. The rings are completed with a yellow gold heart insert. GIA Certified Natural Fancy Dark Orangy Brown Diamond (3.17 ct) ring. Natural mixed-color diamond melee, platinum, 18K yellow gold. Size 10.5. GIA Certified Natural Fancy Dark Orangy Brown Diamond (2.51 ct) ring. Natural mixed-color diamond melee, platinum, 18K yellow gold. Size 9. 2 3 Pasha Ring A very mysterious brooch that seems to glow and come to life in subdued light. A genie, a sultan or an empress would wear this spectacular over-sized, seriously sensuous art ring. A truly magnificent piece of sculpture you An 18k white gold petal brooch set with approximately 675 stones can wear. This one-of-a-kind ring features a hand-carved 63.5 ct smoky consisting of VS-FG white diamonds, olive diamonds, brown dia- quartz set in platinum, 18K yellow gold, and 18k white gold with 1.17 ct monds yellow diamonds, pink diamonds, amethysts, multicolored of VS-F-G white diamonds. It fits high up on the hand and is designed sapphires and finished with an elaborate back detail signature grill. specifically to fit comfortably. 4 5 Hand-carved nephrite jade brooches with VS-FG white diamonds, Three beautiful 18k yellow gold hand-carved Australian chrysoprase 18K yellow gold and blackened sterling silver. brooches set with VS-FG white diamonds. -
Use & Care Guide Ruby Series Grill by Sunstone®
RUBY SERIES GRILL BY SUNSTONE® USE & CARE GUIDE Read all instructions before you operate your grill. Save these instructions! Conforms to ANSI STD Z21.58b-2012 Certified to CSA STD 1.6b-2012 Outdoor Cooking Gas Appliance 3174816 To installer or person assembling grill: Leave this manual with grill for future reference. To consumer: Keep this manual for future reference. www.sunstonemetalproducts.com ATTENTION: THE RUBY GRILL MUST BE INSTALLED ACCORDING TO THE INSTALLATION GUIDE SHOWN ON PAGES 9 THRU 14. IF YOUR GRILL INSTALLATION DOES NOT MEET THE BASIC SETUP INSTRUCTIONS ALL WARRANTIES MAY BE VOID. SEE WARRANTY ON LAST PAGE. Welcome & Congratulations Congratulations on your purchase of a new Ruby grill! We are very proud of our product and we are completely committed to providing you with the best service possible. Your satisfaction is our #1 priority. Please read this manual carefully to understand all the instructions about how to install, operate and maintain for optimum performance and longevity. We know you’ll enjoy your new grill and thank you for choosing our product. We hope you consider us for future purchases. How to Obtain Service Before you call Is there Gas supplied to the Grill? Have you recently refilled the LP Tank? Please make sure you have the following information: MODEL NUMBER | DATE OF PURCHASE| INVOICE NUMBER. KEEP A COPY OF THE GRILLS ITEMIZED INVOICE FOR YOUR RECORDS For warranty service, contact SUNSTONE Customer Service Department at (888)-934-9449 or email [email protected]. SUNSTONE METAL PRODUCTS LLC. 16004 Central Commerce Dr, Pflugerville Texas 78660. Business Hours.