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Color Change of Gemstones by Exposure to Gamma Rays
2015 International Nuclear Atlantic Conference - INAC 2015 São Paulo, SP, Brazil, October 4-9, 2015 ASSOCIAÇÃO BRASILEIRA DE ENERGIA NUCLEAR - ABEN ISBN: 978-85-99141-06-9 COLOR CHANGE OF GEMSTONES BY EXPOSURE TO GAMMA RAYS Giovanna L. C. de Lima1 and Fernando S. Lameiras2 1 Centro de Desenvolvimento da Tecnologia Nuclear (CDTN) Campus da UFMG - Pampulha Av. Antônio Carlos 6627 31270-901 Belo Horizonte, MG [email protected] 2 Centro de Desenvolvimento da Tecnologia Nuclear (CDTN) Campus da UFMG - Pampulha Av. Antônio Carlos 6627 31270-901 Belo Horizonte, MG [email protected] ABSTRACT A gem is appreciated by collectors and, when polished, widely used for jewelry manufacturing. For example, when quartz naturally or artificially acquires a color it becomes a gemstone (smoky quartz, morion, citrine, amethyst, or prasyolite). The presence of chromophore elements in a quartz sample was analysed by Fourier transform infrared spectrometry (FTIR). With a semi-quantitative analysis of the absorption FTIR spectra, it was possible to predict if colorless quartz has the potential to develop color when exposed to ionizing radiation and heat. Specific absorption bands show the presence of chromophore elements in quartz such as aluminum, iron, hydrogen, sodium, or lithium. Considering the ratio of the heights of the absorption bands of these elements, it was possible to predict the color quartz can develop. Samples of irradiated dark and light violet fluorites were analyzed by FTIR and energy-dispersive X-rays spectroscopy. The light violet samples has higher content of calcium relative to fluorine, as well higher content of hydroxyl, probably replacing fluorine in crystal lattice. -
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. -
Bird List Column A: 1 = 70-90% Chance Column B: 2 = 30-70% Chance Column C: 3 = 10-30% Chance
Colombia: Chocó Prospective Bird List Column A: 1 = 70-90% chance Column B: 2 = 30-70% chance Column C: 3 = 10-30% chance A B C Tawny-breasted Tinamou 2 Nothocercus julius Highland Tinamou 3 Nothocercus bonapartei Great Tinamou 2 Tinamus major Berlepsch's Tinamou 3 Crypturellus berlepschi Little Tinamou 1 Crypturellus soui Choco Tinamou 3 Crypturellus kerriae Horned Screamer 2 Anhima cornuta Black-bellied Whistling-Duck 1 Dendrocygna autumnalis Fulvous Whistling-Duck 1 Dendrocygna bicolor Comb Duck 3 Sarkidiornis melanotos Muscovy Duck 3 Cairina moschata Torrent Duck 3 Merganetta armata Blue-winged Teal 3 Spatula discors Cinnamon Teal 2 Spatula cyanoptera Masked Duck 3 Nomonyx dominicus Gray-headed Chachalaca 1 Ortalis cinereiceps Colombian Chachalaca 1 Ortalis columbiana Baudo Guan 2 Penelope ortoni Crested Guan 3 Penelope purpurascens Cauca Guan 2 Penelope perspicax Wattled Guan 2 Aburria aburri Sickle-winged Guan 1 Chamaepetes goudotii Great Curassow 3 Crax rubra Tawny-faced Quail 3 Rhynchortyx cinctus Crested Bobwhite 2 Colinus cristatus Rufous-fronted Wood-Quail 2 Odontophorus erythrops Chestnut Wood-Quail 1 Odontophorus hyperythrus Least Grebe 2 Tachybaptus dominicus Pied-billed Grebe 1 Podilymbus podiceps Magnificent Frigatebird 1 Fregata magnificens Brown Booby 2 Sula leucogaster ________________________________________________________________________________________________________ WINGS ● 1643 N. Alvernon Way Ste. 109 ● Tucson ● AZ ● 85712 ● www.wingsbirds.com (866) 547 9868 Toll free US + Canada ● Tel (520) 320-9868 ● Fax (520) -
The Wittelsbach-Graff and Hope Diamonds: Not Cut from the Same Rough
THE WITTELSBACH-GRAFF AND HOPE DIAMONDS: NOT CUT FROM THE SAME ROUGH Eloïse Gaillou, Wuyi Wang, Jeffrey E. Post, John M. King, James E. Butler, Alan T. Collins, and Thomas M. Moses Two historic blue diamonds, the Hope and the Wittelsbach-Graff, appeared together for the first time at the Smithsonian Institution in 2010. Both diamonds were apparently purchased in India in the 17th century and later belonged to European royalty. In addition to the parallels in their histo- ries, their comparable color and bright, long-lasting orange-red phosphorescence have led to speculation that these two diamonds might have come from the same piece of rough. Although the diamonds are similar spectroscopically, their dislocation patterns observed with the DiamondView differ in scale and texture, and they do not show the same internal strain features. The results indicate that the two diamonds did not originate from the same crystal, though they likely experienced similar geologic histories. he earliest records of the famous Hope and Adornment (Toison d’Or de la Parure de Couleur) in Wittelsbach-Graff diamonds (figure 1) show 1749, but was stolen in 1792 during the French T them in the possession of prominent Revolution. Twenty years later, a 45.52 ct blue dia- European royal families in the mid-17th century. mond appeared for sale in London and eventually They were undoubtedly mined in India, the world’s became part of the collection of Henry Philip Hope. only commercial source of diamonds at that time. Recent computer modeling studies have established The original ancestor of the Hope diamond was that the Hope diamond was cut from the French an approximately 115 ct stone (the Tavernier Blue) Blue, presumably to disguise its identity after the that Jean-Baptiste Tavernier sold to Louis XIV of theft (Attaway, 2005; Farges et al., 2009; Sucher et France in 1668. -
Intergrown Emerald Specimen from Chivor Tity Was Confirmed by Raman Spectroscopy
Editor Nathan Renfro Contributing Editors Elise A. Skalwold and John I. Koivula Intergrown Emerald Specimen from Chivor tity was confirmed by Raman spectroscopy. The inclusion exhibited a well-formed hexagonal prismatic shape with Colombia’s Chivor emerald mines are located in the east- pyramid-like termination (figure 2). Although intergrowth ern zone of the Eastern Cordillera range of the Andes emerald crystals have been described and documented in Mountains. Chivor translates to “green and rich land” in the literature several times (G. Grundmann and G. Giu- Chibcha, the language of the indigenous people who were liani, “Emeralds of the world,” in G. Giuliani et al., Eds., already mining emerald more than 500 years ago, before Emeralds of the World, extraLapis English, No. 2, 2002, pp. the arrival of the Spanish conquistadors (D. Fortaleché et al., “The Colombian emerald industry: Winds of change,” Fall 2017 G&G, pp. 332–358). Chivor emeralds exhibit a bright green color with a tint of blue; they have relatively Figure 1. An emerald crystal inclusion measuring high clarity and fewer inclusions than emeralds found in ~2.67 × 2.71 × 5.43 mm is found inside this large Colombia’s western belt. emerald specimen (18.35 × 10.69 × 9.79 mm) from Colombia’s Chivor mine. Photo by John Jairo Zamora. The authors recently examined a rough emerald crystal specimen (figure 1), measuring 18.35 × 10.69 × 9.79 mm, reportedly from Chivor. This crystal weighed 3.22 g (16.10 ct) and had a prismatic hexagonal crystal shape. Standard gemological examination confirmed the gemstone to be emerald, and ultraviolet/visible/near-infrared (UV-Vis-NIR) spectroscopy showed a classic Colombian emerald absorp- tion spectrum. -
Lapidary Journal Jewelry Artist March 2012
INDEX TO VOLUME 65 Lapidary Journal Jewelry Artist April 2011-March 2012 INDEX BY FEATURE/ Signature Techniques Part 1 Resin Earrings and Pendant, PROJECT/DEPARTMENT of 2, 20, 09/10-11 30, 08-11 Signature Techniques Part 2 Sagenite Intarsia Pendant, 50, With title, page number, of 2, 18, 11-11 04-11 month, and year published Special Event Sales, 22, 08-11 Silver Clay and Wire Ring, 58, When to Saw Your Rough, 74, 03-12 FEATURE ARTICLES Smokin’*, 43, 09/10-11 01/02-12 Argentium® Tips, 50, 03-12 Spinwheel, 20, 08-11 Arizona Opal, 22, 01/02-12 PROJECTS/DEMOS/FACET Stacking Ring Trio, 74, Basic Files, 36, 11-11 05/06-11 DESIGNS Brachiopod Agate, 26, 04-11 Sterling Safety Pin, 22, 12-11 Alabaster Bowls, 54, 07-11 Create Your Best Workspace, Swirl Step Cut Revisited, 72, Amethyst Crystal Cross, 34, 28, 11-11 01/02-12 Cut Together, 66, 01/02-12 12-11 Tabbed Fossil Coral Pendant, Deciphering Chinese Writing Copper and Silver Clay 50, 01/02-12 Linked Bracelet, 48, 07-11 12, 07-11 Stone, 78, 01/02-12 Torch Fired Enamel Medallion Site of Your Own, A, 12, 03-12 Easier Torchwork, 43, 11-11 Copper Wire Cuff with Silver Necklace, 33, 09/10-11 Elizabeth Taylor’s Legendary Wire “Inlay,” 28, 07-11 Trillion Diamonds Barion, 44, SMOKIN’ STONES Jewels, 58, 12-11 Coquina Pendant, 44, 05/06-11 Alabaster, 52, 07-11 Ethiopian Opal, 28, 01/02-12 01/02-12 Turquoise and Pierced Silver Ametrine, 44, 09/10-11 Find the Right Findings, 46, Corrugated Copper Pendant, Bead Bracelet – Plus!, 44, Coquina, 42, 01/02-12 09/10-11 24, 05/06-11 04-11 Fossilized Ivory, 24, 04-11 -
Exceptional Works of Art 2017 PUSHKIN ANTIQUES – MAYFAIR –
Exceptional works of art 2017 PUSHKIN ANTIQUES – MAYFAIR – At Pushkin Antiques we specialise in unique statement Each item is professionally selected and inspected pieces of antique silver as well as branded luxury items, to ensure we can give our customers a guarantee of stylish interior articles and objects d’art. authenticity and the required peace of mind when buying from us. Since the inception of our company, we’ve been at the forefront of online sales for high end, quality antiques. Our retail gallery is located on the lower floor of the world Our presence on most major platforms has allowed us famous Grays Antiques Centre in the heart of Mayfair. to consistently connect exquisite pieces with the most discerning collectors and interior decorators from all over the world with particular focus on the demands of the markets from the Far East, the Americas, Europe & Russia. www.pushkinantiques.com [email protected] We aim to provide the highest quality in every department: rare hand crafted articles, accurate item descriptions (+44) 02085 544 300 to include the history and provenance of each item, an (+44) 07595 595 079 extensive photography report, as well as a smooth buying process thus facilitating an efficient and pleasant online Shop 111, Lower Ground Floor, Grays Antiques Market. experience. 58 Davies St, London. W1K 5AB, UK. ALEX PUSHKIN OLGA PUSHKINA DUMITRU TIRA Founder & Director Managing Director Photographer Contents 6 ENGLISH SILVER 42 CHINESE SILVER 56 JAPANESE SILVER 66 INDIAN SILVER 78 BURMESE SILVER 86 CONTINENTAL SILVER 100 FRENCH SILVER 108 GERMAN SILVER 118 RUSSIAN SILVER 132 OBJECTS OF VERTU English Silver The style and technique in manufacturing silver during Hester Bateman (1708-1794) was one of the greatest this era (over 100 years) changed radically, reflecting silversmiths operating in this style, she is the most the variations in taste, society, costumes, economic and renowned and appreciated female silversmith of all time. -
Mcconnell's Flycatcher Mionectes Macconnelli Is More Than One Species
Steven L. Hilty & David Ascanio 270 Bull. B.O.C. 2014 134(4) McConnell’s Flycatcher Mionectes macconnelli is more than one species by Steven L. Hilty & David Ascanio Received 25 April 2014 Summary.—Information on voice, display behaviour, elevational distribution and morphology of McConnell’s Flycatcher Mionectes macconnelli indicate that the two northern populations, long regarded as a single species, actually comprise two species-level taxa—a widespread lowland form macconnelli and a highland form roraimae. The two forms are similar in plumage, but difer signifcantly in wing and tail length, and most importantly in vocalisations and display behaviour. They are separated by elevation, with macconnelli found in humid lowland forest up to c.500 m and roraimae usually well above 500 m. Another highland taxon, mercedesfosteri, difers litle from roraimae and is not recognised here as distinct, although its voice is unknown. Two isolated populations, one in central Peru, the other in lowland Amazonia are not evaluated, but merit additional study. During the past few decades a beter understanding of mechanisms underpinning reproductive isolation has sparked a re-examination of species limits of many taxa. Avian vocalisations and habitat preferences, in particular, have been shown to be important isolating mechanisms (Zimmer 1997, Isler et al. 1999, Zimmer & Whitaker 2000, Whitaker 2002, Salaman et al. 2003, Braun et al. 2005). This paper documents an example of two morphologically similar forms, Mionectes m. macconnelli and M. m. roraimae, which we believe have achieved reproductive isolation through voice, behaviour and diferences in elevational distribution. McConnell’s Flycatcher Mionectes macconnelli is a drab, mostly olive-plumaged Tyrannidae found east of the South American Andes. -
Pearl Accessories Operator's Manual
Pearl® Trilogy Accessories Manual CE Marking: This product (model number 5700-DS) is a CE-marked product. For conformity information, contact LI-COR Support at http://www.licor.com/biotechsupport. Outside of the U.S., contact your local sales office or distributor. Notes on Safety LI-COR products have been designed to be safe when operated in the manner described in this manual. The safety of this product cannot be guaranteed if the product is used in any other way than is specified in this manual. The Pearl® Docking Station and Pearl Clean Box is intended to be used by qualified personnel. Read this entire manual before using the Pearl Docking Station and Pearl Clean Box. Equipment Markings: The product is marked with this symbol when it is necessary for you to refer to the manual or accompanying documents in order to protect against damage to the product. The product is marked with this symbol when a hazardous voltage may be present. Manual Markings: WARNING Warnings must be followed carefully to avoid bodily injury. CAUTION Cautions must be observed to avoid damaging your equipment. NOTE Notes contain additional information and useful tips. IMPORTANT Information of importance to prevent procedural mistakes in the operation of the equipment or related software. Failure to comply may result in a poor experimental outcome but will not cause bodily injury or equipment damage. Federal Communications Commission Radio Frequency Interference Statement WARNING: This equipment generates, uses, and can radiate radio frequency energy and if not installed in accordance with the instruction manual, may cause interference to radio communications. -
F I N E C R a F T J E W E L R Y C O L L E C T I O N 2014
F i n e C r a f t J e w e l r y C o l l e c t i o n 2014 www.MarthaSeelyDesign.com y jewelry is always a reflection of the art forms that have inspired me over the years: Fiber, fashion, and the grace of natural forms; The boldness of architectural concepts; The simplicity of cold connections, and the kinetic energy of objects in M motion. It expresses in precious metal and gemstones, the strongest influences in my life as a designer: clothing/costume design, art history (with a special fondness for the Art Nouveau /Art Deco movements) and the uniqueness and strength of individual style. Floral Nouveau was inspired by my love of the Art Nouveau (and Deco) movement of the late Curved lines nineteenth century. It is contemporary and feminine. The woven wire combines my love of fiber with the asymmetrical, sinuous vines used widely within Art Nouveau art and design. and vines, woven Floral Architecture is layered contemporary jewelry with simple construction techniques where together. stones seem to float in their floral frames. The floral shapes are simple, layered and riveted together, sometimes flat and sometimes hammered and sculptural. Hammered and Echo Structures are multi-layers of simple, architectural shapes. Rivets. Textures. Con- sometimes sculptural trasts. Brilliant colored stones. Modern and clean. flowers. Formed and Winged Secrets are edgy, formed, textured and riveted flying insects. Sometimes the wings riveted flying insects. move, sometimes not. They are made in silver and gold with large faceted gemstone heads. Everything is handmade, hand formed and one of a kind. -
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. -
SANCTUARY Collection Smoke
The SANCTUARY Collection Smoke SANCTUARY COLLECTION Inherently flame retardant woven collection. Living in a busy world and consumed with technology, phones and people, it’s a delight to relax in the sanctuary of home and cocoon yourself in calm and comfort. SANCTUARY is a fluid collection embracing the continuous transition of fabric, textures and form. Nature has been an overriding influence with organics and fern patterns creating a firm retreat from a hectic world. The feature pattern, AURA, reflects on the ferns and leaves found in our serene countryside. ELIXIR captures the iridescent sparkle of the two tone effects so often seen as the light sparkles thorough the leaves in the woods. DIVINE adds some form to the relaxed lines of the collection. PULSE and RHYTHM explore the organic textures and surfaces found in forest landscapes, and SERENE adds great textural influence to co-ordinate in an upholstery role. Sheers are included to endorse the diaphanous character of nature, adding a whisper of colour and a casual laid-back appeal. Colourways are gentle and atmospheric; including versatile neutrals and greys with pops of ginger, lime, teal, damson and indigo. Independently tested for UK and International FR standards. Wide width (280cm / 110 inches) also available, ask for further details. MAIN IMAGE Headboard METRO Mist Scatters AURA Smoke DIVINE Smoke ELIXIR Midnight Bed Runner PULSE Midnight MANHATTAN Denim 2 3 Henna Citrine MAIN IMAGE Curtain AURA Henna Scatters LUXE Saffron DIVINE Henna ECHO Pumice RHYTHM MAIN IMAGE Curtain