 | | Book | | 1982 Jules Roger Sauer ” Foreword For years Brazil has been the major producer of colored stones in...metamorphic rocks, the variety of gem deposits in Brazil is almost infinite. In addition to the mineral...assemblage one might expect from pegmatite dikes, Brazil also produces a very significant output of diamonds...written in English, and beautifully illustrated. “Brazil, Paradise of Gemstones’, by Jules Roger Sauer,...turquoise vein near the village of Casa Nova, in Bahia, later flooded by the waters of the Sobradinho dam |  | | Book | | lapidary artist as well, mainly for its role in rutilated quartz and star sapphire. These minerals are also...occasionally faceted, that looks very similar to rutilated quartz is the so-called it the stones tend to be...all but the very small- rutilated topaz, which was first marketed from Brazil and t are virtually opaque...simulant, but its optical properties inclusions in "rutilated topaz" are not rutile crystals at all, specially...plays in creating asterism in star sapphire tilated quartz, working it into attractive faceted stones, and |  | | Journal (article/letter/editorial) | | Arizona 85011 jeffscovil@earthlink.net Figure 1. Quartz (4.8 cm) from Middleville, Herkimer County, New...faces (fig. 5), but skeletal quartz (also called fenster or window quartz) (fig. 6) is an even better...Windler specimen. Figure 6. Skeletal crystal of quartz (9.7 cm) from Treasure Mountain North, Manheim...20 December 2017 each other by a void. Skeletal quartz from North Carolina and Porretta Terme, Italy,...symmetrically different faces. Figure 9. Rutilated quartz crystal (11.3 cm tall) with a large rounded |  | | Journal (article/letter/editorial) | | Stoller and fellow artist Glenn Lehrer are presenting Bahia, the world’s largest cut-gem sculpture. The 602-pound...as an 812-pound single crystal of rutilated quartz from Bahia, Brazil, measuring 53 inches long and 28...show. wide. The transparent crystal contains a rutilated star inclusion nearly a foot in diameter. The...whose image of a choice specimen of elbaite with quartz from Hillman Hall is being used in print advertising...on carving; Stoller will discuss the making of Bahia, and he expects to provide a panel discussion on |  | | Journal (article/letter/editorial) | | Department of Geology Auburn Universit Rutile=Included Quartz Downloaded by [McGill University Library] at 05:41...issue’s Connoisseur’s Choice. The specimen, rutilated quartz from Waterbury, Vermont (see fig.), is interesting...that is in considerable demand by collectors. Rutilated quartz is also a popular gem material, having been...cabochons, spheres, and other ornamental devices. Rutilated quartz is known by a number of names that include...(love’s arrow), and Venus’ hair stone. The host quartz may be colorless, smoky, or amethystine and occurs |  | | Journal (issue) | | Pearl Testing 36 Emeralds from South America – Brazil and Colombia 48 Clinohumite – The Mountain Fire...rise of new economies such as China, India, and Brazil. The challenges have been numerous as these new...every ICA member, I would like to thank the IBGM in Brazil along with every company, individual, and government...of the gravel is 5 to 20 inches, and consists of quartz and fragments of the crystalline rock above mentioned... G E M O LO G Y Emeralds from South America – Brazil and Colombia By Dr. Dietmar Schwarz, research manager |  | | Journal (article/letter/editorial) | | sponsoring a trip to the gem deposits of Minas Gerais, Brazil. Dates are 29 June to 12 July. Dr. Tony Kampf,...already making plans to return next year. The “Bahia,” billed as the world’s largest cut gemstone, was...from a near-flawless, transparent Brazilian rutilated quartz crystal and took seven years to complete....display through August. (For those interest- The “Bahia” with Glenn Lehrer (left) and Lawrence Stoller,...minerah quadrangle include a 3.5-ton piece of rose quartz from Quadeville as well as oversized samples of |  | Menezes Filho, Luiz A. D., Chaves, Mario L. S. C., Chukanov, Nikita V., Atencio, Daniel, Scholz, Ricardo, Pekov, Igor, da Costa, Geraldo Magela, Morrison, Shaunna M., Andrade, Marcelo B., Freitas, Erico T. F., Downs, Robert T., Belakovskiy, Dmitriy I. (2018) Parisite-(La), ideally CaLa2(CO3)3F2, a new mineral from Novo Horizonte, Bahia, Brazil. Mineralogical Magazine, 82 (1) 133-144 doi:10.1180/minmag.2017.081.028 | Journal (article/letter/editorial) | | CaLa2(CO3)3F2, a new mineral from Novo Horizonte, Bahia, Brazil LUIZ A. D. MENEZES FILHO1,†, MARIO L. S. C....Antônio Carlos, 6627, 31270-901, Belo Horizonte, MG, Brazil 2 Institute of Problems of Chemical Physics, Russian...Geociências, Rua do Lago 562, 05508-080, São Paulo, Brazil 4 Universidade Federal de Ouro Preto (UFOP), Escola...Campus Morro do Cruzeiro, 35400-000, Ouro Preto, MG, Brazil 5 Faculty of Geology, Moscow State University,...Campus Morro do Cruzeiro, 35400-000, Ouro Preto, MG, Brazil 7 Department of Geosciences, University of Arizona |  | Menezes Filho, Luiz A. D., Chukanov, Nikita V., Rastsvetaeva, Ramiza K., Aksenov, Sergey M., Pekov, Igor V., Chaves, Mário L. S. C., Richards, R. Peter, Atencio, Daniel, Brandão, Paulo R. G., Scholz, Ricardo, Krambrock, Klaus, Moreira, Roberto L., Guimarães, Frederico S., Romano, Antônio W., Persiano, Aba C., de Oliveira, Luiz C. A., Ardisson, José D. (2015) Almeidaite,
Pb(Mn,Y)Zn2(Ti,Fe3+)18O36(O,OH)2,
a new crichtonite-group mineral, from Novo Horizonte, Bahia,
Brazil. Mineralogical Magazine, 79 (2) 269-283 doi:10.1180/minmag.2015.079.2.06 | Journal (article/letter/editorial) | | crichtonite-group mineral, from Novo Horizonte, Bahia, Brazil LUIZ A. D. MENEZES FILHO1, NIKITA V. CHUKANOV2...6627, 31270-902, Belo Horizonte, Minas Gerais, Brazil 2 Institute of Problems of Chemical Physics, Russian...Geociências, Rua do Lago, 562, 05508-080, São Paulo, SP, Brazil 7 Universidade Federal de Minas Gerais (UFMG),...6627, 31270-902, Belo Horizonte, Minas Gerais, Brazil 8 Universidade Federal de Ouro Preto (UFOP), Escola...Cruzeiro, 35400-000, Ouro Preto, Minas Gerais, Brazil 9 Universidade Federal de Minas Gerais (UFMG), |  | | Journal (article/letter/editorial) | | 269–276, 2002 Fibrous nanoinclusions in massive rose quartz: HRTEM and AEM investigations CHI MA,* JULIA S...crystals within massive rose quartz from localities in California, South Dakota, Brazil, Madagascar, and Namibia...rose quartz from Brazil. INTRODUCTION EXPERIMENTAL PROCEDURES Fine fibers in massive rose quartz have...(1987) concluded that the fibrous phase in rose quartz from a Montana locality is dumortierite based on...dumortierite. Our XRD patterns of bulk fibers from rose quartz specimens from various localities also deviate |  | | Journal (issue) | | Cover: Inclusion of quartz and rutile needles within quartz. See article, “The Hidden Beauty of Brazilian...Emerald Business in Colombia Focus on Brazil 36 30 Booming Brazil – A Rising Star in the Jewelry Industry...Gemstones 52 Interesting New Gemological Finds in Brazil Mining 62 Andesine in Tibet – A Second Field...Oliveira (2005) describes cases in Campos Verdes, Brazil where inexpensive projects have resulted in concrete...Mining and Local Development: Three Case Studies in Brazil, 31pp. • Sarassin, B., 2006. The mining industry |  | | Journal (issue) | | acicular habit are found as inclusions in rutilated quartz, a variety prized by mineral collectors. Microscopic...needle-like crystal habit that is so prominent in rutilated quartz. Striations parallel to the c-axis are a common...mineral inclusion, most prominently in quartz. Rutilated quartz is an unusual, and sometimes visually...many varieties of rutilated quartz, but in most specimens the encapsulating quartz is transparent or...sparsely distributed or so densely packed that the quartz is almost opaque. Rutile inclusions can range in |  | | Journal (issue) | | geology, and notable localities of diamond mining in Brazil, and outlines plans for future diamond production...deposits. 68 pg. 49 Causes of Iridescence in Natural Quartz Xiayang Lin and Peter J. Heaney Describes the occurrence...iridescence, and the role of differential etching, in quartz crystals from India’s Jalgaon District. NOTES...sapphire • Turquoise Starship Enterprise • Rutilated quartz mining community • Jewelry Industry Summit...liddicoatite tourmaline, Japanese jadeite, iris quartz, synthetic zincite, and a short but important contribution |  | | Book | | will stand the test of time. ON THE COVER: gold on quartz, 4.5 inches tall, Placer County, California Dedication...that the two amethyst crystals and the small clear quartz crystal of an earlier generation had been one specimen...amethysts are associated with a pure white milky quartz that almost looks like porcelain. When the amethyst...beautiful I have ever seen. The specimen of white quartz with the single crystal of deep amethyst measures...countless beautifully crystallized transparent quartz crystals. These are known as “Herkimer diamonds” |  | | Book | | natural, cultured and imitation Alexander E. Fam Quartz Michael O'Donoghue In preparation Amber H. Fraquet...Darragh Topaz D. B. Hoover Butterworths Gem Books Quartz Michael O'Donoghue Butterworths London Boston...O'Donoghue, Michael Quanz.-(Butterworths gem books) I. Quartz I. Title 553.8'7 QE391.Q2 ISBN 0-408-01462-8 Library...O'Donoghue, Michael Quartz (Bunerworths gem books) Bibliography: p. Includes indexes. 1. Quartz. I. Title. II... Preface Even without its gemstone application, quartz is a formidable mineral to survey in a book of |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...Brasileira do Livro, SP, Brazil) Cornejo, Carlos .Minerals & precious stones of Brazil. Carlos Cornejo, Andrea...3. Minerals - Brazil 4. Minerals- Classification 5. Mineralogy 6. Mineralogy - Brazil - History 7. Precious...Precious stones - Brazil I. Bartorelli, Andrea. II. Title. 09-10025 Cover photograph: Crystal of brazilianite...Landmann. CDD-549 Indexes for systematic catalog: 1. Brazil: Minerals and precious stones: Mineralogy and gemology |  | | Journal (article/letter/editorial) | | $ 1 . 0 0 ct. Ovals. Fine faceted andalusites, Brazil, 4'/2 to 5 m m stones at $ 3 . 0 0 ea. Blue zircons...aventurine, fine moss, Utah jet, large clear Brazilian quartz, crazy lace, plume agate) at $ 2 . 0 0 lb. Vz p...p o u n d of f i n e golden rutilated quartz or cacoxenite in amethyst, shattuek i t e , bloodstone for...Exceptional fine green, blue green beryl xls in w h i t e quartz matrix, also nice single xls. A l l specimens cleaned...S A N D BERYLS—Fine terminated crystals f r o m Brazil. Green and blue-green tourmaline, V i " x 1 " $ |  | | Journal (article/letter/editorial) | | $ 1 . 0 0 ct. Ovals. Fine faceted andalusites, Brazil, 4 ' / 2 t o 5 m m stones at $ 3 . 0 0 ea. Blue...Brazilian quartz, crazy lace, plume agate) at $ 2 . 0 0 lb. Vz pound of f i n e golden rutilated quartz or cacoxenite...S A N D BERYLS—Fine terminated crystals f r o m Brazil. Green and blue-green tourmaline, V i " x 1 " $...Exceptional fine green, blue green beryl xls in w h i t e quartz matrix, also nice single xls. A l l specimens cleaned...E W M E X I C O — 75(Z, $ 1 . 5 0 , $ 2 . 2 5 . Quartz x l . w / c h ! o r i t e phantom incl. 1 V2 x |  | Gonçalves, Guilherme O., Lana, Cristiano, Buick, Ian S., Alkmim, Fernando F., Scholz, Ricardo, Queiroga, Glaucia (2019) Twenty million years of post-orogenic fluid production and hydrothermal mineralization across the external Araçuaí orogen and adjacent São Francisco craton, SE Brazil. Lithos, 342. 557-572 doi:10.1016/j.lithos.2019.04.022 | Journal (article/letter/editorial) | | Araçuaí orogen and adjacent São Francisco craton, SE Brazil Guilherme O. Gonçalves, Cristiano Lana, Ian S...Araçuaí orogen and adjacent São Francisco craton, SE Brazil, LITHOS, https://doi.org/ 10.1016/j.lithos.2019...Araçuaí orogen and adjacent São Francisco craton, SE Brazil Guilherme O. Gonçalvesa,* goncalves.go@icloud.com...the adjacent São Francisco craton. Titanium-in-quartz thermometry suggests that most hydrothermal systems...iii) a multitude of meter to kilometer-scale NU quartz veins (Scholz et al., 2012). Recently obtained |  | | Journal (issue) | | 0026-4628 'Continued on p. 415 Articles Diamonds in Brazil .................................................on the cause of smoky and amethystine color in quartz .................................................35565, Tucson, AZ 85740. BLUE QUARTZ A synthetically colored blue quartz (trade named “Aqua Aura”) was...layered dot pattern of metallic gold on colorless quartz. The effect is striking, and the treated crystals...Universitaria, Ilha do Fundao 21.910 Rio de Janeiro, Brazil Since their discovery in Minas Gerais, near the |  | | Journal (issue) | | SPRING 2006 PAGES 1–94 “Paraíba” Tourmaline from Brazil, Nigeria, and Mozambique Lead Glass–Filled Rubies... “Paraíba”-type Copper-bearing Tourmaline from Brazil, Nigeria, and Mozambique: Chemical Fingerprinting...Inscriptions inside emerald crystals • Color-coated star quartz • Variscite, resembling turquoise 62 Gem News...Myanmar • Gem-quality massive pink muscovite from Brazil • Pyrope-spessartine from Tanzania • Transparent...in copal • Colored fluid inclusions in quartz • “Platinum quartz” with star • New Madagascar mining laws |  | | Book (edition) | | Data (CIP) (Information Sectorial Nucleus, SP, Brazil) I59 IBGM. Handbook of Gems / IBGM, DNPM. – 4...I. Title. CDU 549.091 Federative Republic of Brazil Ministry of Mines and Energy National Department...respect to the most commonly found and traded gems in Brazil. Such information is generally described in documents...to disclose our vast gemological assets both in Brazil and abroad. Therefore, this publication covers...Andradite Garnet 24 Apatite 25 Aquamarine 26 Aventurine Quartz 27 Bicolor Tourmaline 28 Bloodstone 29 Brazilianite |  | | Book | | Einschlüsse im Quarz Magie World: lnclusions in Quartz Vorwort Foreword Einführung 7 8 1ntrod...Sulfates, Wolframates Carbonates Silicates Synthetic quartz Final comments Acknowledgements References Photo...only represent a small and limited selection of quartz inclusions and should encourage the readers to...venture on their own journey into the magic world of quartz inclusions, maybe discovering a new, fantastic...aber auch wunderschöne crystals in pegmatites, quartz Kristalle in Pegmatiten, Quarzveins, ore deposits |  | | Journal (issue) | | Articles 708 Coloured Stone Mining and Trade in Brazil: A Brief History and Current Status By Aurélien...Collection V. L. Villani photo p. 758 Cover Photo: Brazil is the source of a variety of coloured stones,...(Figure 4b), spessartine (Figure 4c), almandine, quartz, zircon, apatite, topaz, sillimanite, fluorite...tourmaline (Figure 4d), aquamarine, spessartine, quartz, topaz, zircon and phenakite are mined. Tourmaline...Junior (BC Gemas do Brasil, Governador Valadares, Brazil), and heating to 500°C in air was successful in |  | | Journal (issue) | | ...................... 3 The Many Varieties of Quartz ................................................................................. 5 Meet the Quartz Family .............................................Varieties of Quartz by Denise Bicknell Member of the Houston Gem & Mineral Society he mineral quartz, SiO2...Properties of Quartz: To understand quartz we must first describe what makes it uniquely itself. Quartz is composed...and is represented by the chemical formula SiO2. Quartz crystallizes in the trigonal system and shows three-fold |
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Bahia, Brazil