 | | Book | | 1982 Jules Roger Sauer â 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. âBrazil, Paradise of Gemstonesâ, by Jules Roger Sauer,...Century. The book is a showcase ofthe best from Brazil and it makes a handsome evocation of what is beautiful |  | | Book | | BARTORELLI ::⢠. . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA Š...Lavra do Sapo, Ferruginha, Conselheiro Pena, Minas Gerais. Collection of Alvaro Lucio. Photograph taken...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 |  | | Journal (issue) | | 3 FEATURE ARTICLES Gem Pegmatites of Minas Gerais, Brazil: The Tourmalines of the Araquai Districts...tourlnaline thon anywhere else in the world-Minos Gerais, Brazil; the other with (I new locality for red tourmaline-Zcrmbia...thousand miles south, to the "Gem Pegmatites of Minas Gerais." THe first in a series (which Cdntinues in...his extensive travels in the mining regions of Brazil. Mr. Proctor received an M.S. in molecular biology...graduate gemologist. GEM PEGMATITES OF MINAS GERAIS, BRAZIL: THE TOURMALINES OF THE ARACUAI DISTRICTS |  | | Book | | ltatiaia, Conseilheiro Pena, Governador Valadares, Brazil (Roger Titeux collection, France) 4 inches. Above:...Bahia, Brazil (Yves Gillet collection, France) 1.2 inches. Preceding pages: A Tourmaline, Minas Gerais...Gerais, Brazil (4.2 inches) B Tourmaline, Queen Mine, San Diego County, California (8 inches) C Garnet, hessonite...colors, as in malachite, or their structures, as in agate, to the best advantage. Some of these ornamental...order to extract the gems. Such was the case in Brazil with diamonds; it is still used in the deposits |  | | Book | | until he managed to reach the land of his dreams, Brazil. A specialist in the field of geology and mineralogy...crystals and the remarkable mineral treasures of Brazil, as well as the incredible adventures and difficulties...UNIQUE MINERALS IN WORLD MUSEUMS  GEM TREASURES OF BRAZIL Cyan Magenta Yellow Black 1 Delev Ilia Deleff...UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL SOFIAâMOSCOW 2004 3 Cyan Magenta Yellow Black...MINERAL TREASURES OF BRAZIL 76 85 AN OUTLINE OF THE MINERAL RESOURCES OF BRAZIL ORIGIN OF GIANT CRYSTALS |  | | Book | | MINES AND MINERALS IN BRAZIL --= ¡¡--¡ ¡¡- ¡-¡=- MINES AND MINERALS IN BRAZIL J OSIAS LEAO (ECONOMIC...regarding water power and industry of electr¡icity in Brazil were specially prepared at the Division of Waters........ 189 SUMMARY OF THE MINERAL RESERVES OF BRAZIL..... . ... ....... . .. 199 STATISTICAL TABLES...practically untouched, the mineral reserves of Brazil have already been a source of wealth to many and...without the discovery of the precious metals in Brazil the existence of the modern economic man would |  | | Journal (issue) | | Articles 708 Coloured Stone Mining and Trade in Brazil: A Brief History and Current Status By AurĂŠlien...Collection V. L. Villani photo p. 758 Cover Photo: Brazil is the source of a variety of coloured stones,...Gemmology, 35(8), 2017 Gem Notes a b c d cedony (agate), danburite, scapolite, moonstone and kornerupine...Junior (BC Gemas do Brasil, Governador Valadares, Brazil), and heating to 500°C in air was successful in...recently had the pleasure to study two chalcedony/agate cameos that were fascinating for their gemmological |  | | Journal (issue) | | . ⢠⢠⢠⢠⢠⢠⢠⢠⢠⢠I 5.00 Rutilated Quarts, Brazil. 3 x 2 ½ x I . Polished curved face. Plus tax â˘.... . . . . . . . . . . . 2.00 Quarts w Phantom, Brazil. Fine green phantom in xi. 3 x 2 Âź . . . . . ....Evelyn Waite ..................116 QUAR1Z CRYSTAL IN BRAZIL .....................................................................118 SEMIPRECIOUS STONES IN BRAZIL .................................................MAGNETIC PROSPECTING ...............â˘124 MICA IN BRAZIL .............................................. |  | | Journal (issue) | | mine, Minas GĂŠrais, Brazil. See 'The location, geology and mineralogy of gem tourmalines in Brazil' on...location, geology and mineralogy of gem tourmalines in Brazil Jacques P. Cassedanne, Dr. Sc. *, and Maurice Roditi...tourmaline is the 'Eastern pegmatitic province' of Minas Gerais. One general and three detailed maps of specific...Tourmaline, pegmatite, eluvial deposits, gem mining, Brazil Š Gemmological Association and Gem Testing Laboratory...the most remarkable coloured gemstones mined in Brazil where, erroneously, for a long time it was marketed |  | | Journal (issue) | | Oregon, before starting his own business, Smithâs Agate Shop, in 1918. In 1920 he listed himself as âpart-ownerâ...in Portland in 1949, at the age of 56. Smithâs Agate Shop had by then been taken over by his brother...of like-minded individuals organized the Oregon Agate and Mineral Society, with Dake as its first president...Richard and Helen began to casually gather pebbles of agate and jasper while strolling Oregon beaches on weekends...revealed. They soon became members of the Oregon Agate and Mineral Society (OAMS) and took part in field |  | | Journal (issue) | | kunzite), 9 cm, from the Urucum mine, GalilĂŠia, Minas Gerais, Brazil. Gus & Jane Eifler collection; Holly Smith...Topaz, 15 cm, from Hematita, Antonio Dias, Minas Gerais, Brazil. Tom Spann photo. (below right) Spinel...Aquamarine, 9 cm, from Corrego SĂŁo Francisco, Minas Gerais, Brazil. Tom Spann photo. Rhodochrosite on manganite...Almandine-spessartine on albite, 4.9 mm, Poaia pegmatite, Minas Gerais, Brazil. Beth Van Allen photo. 24 Elbaite tourmaline...cm, Pederneira mine, SĂŁo JosĂŠ da Safira, Minas Gerais, Brazil. Supplement to The Mineralogical Record |  | | Journal (issue) | | THE EARTHâS TREASURES ⢠MINERALS AND JEWELRY BRAZIL A Gem and Mineral R&G KIDS Thunderbolts PARADISE...11 November 2014 FeaTures The pegmatites of Brazil are long-time producers of stunning mineral specimens...is from the Jonas mine in Conselheiro Pena (Minas Gerais). (Jeff Scovil photo/Ryan Bowling collection...every rockhound has a responsibility by Bob Jones Brazil: A Mineral Paradise ......................... 12...11 RG1114 Masterrev.idml 11 9/30/14 9:18 AM BRAZIL: A Mineral Paradise A Productive Source of Fine |  | | Catalog/List | | In the early 1980s Rock began to concentrate on Brazil and Peru with occasional trips to Uruguay, Chile...Project. Another was the 7,500+ quartz in Minas Gerais, Brazil: a micromount collection. And of course..............................................196 Brazil..................................................have previously looked down their noses about âagate lickersâ have had to seriously reconsider their...several from Luis Bareto [sic] in Reciefe [sic], Brazil when he sold his collection. The scale under the |  | | Book | | cm Page 251: Calcite, Irai, Rio Grande do Sul, Brazil * 12.5 x 10 x 10.5 em Page 252: Gypsum rosette...banded growths in thodochrosite (page 112) and agate (page 167), document these changes. Such features...environment. solidified. In some basalts of India and Brazil, these cavities are large enough for a person...some of the worldâs finest crystals of amethyst, agate and a large family of silicate minerals known collectively...before it ABOVE: Imperial topaz, Ouro Preto, Minas Gerais, Brazil ° 3.3 x 2.7 x 1.8 om, 159.10 ct RIGHT: Round |  | | Journal (issue) | | and Anthony R. Kampf Gem Pegmatites of Minas Gerais, Brazil: Exploration, Occurrence, and Aquamarine...the northeastern section of the state of Minas Gemis, Brazil. The history of gem exploration and m i n...Te6filo Otoni-Marambaia pegmatite district of Minas Gerais. As is common with most aquamarines, the stones...gem pegmatite regions of the 20th century: Minas Gerais, Brazil. With these articles, we hope to take you...what pegmatite gems have meant historically in Brazil and the production of one very important pegmatite |  | | Book | | Occurrence: The Americas 63 USA 64 Mexico 72 Panama 75 Brazil 75 Canada 80 7 Occurrence: Rest of the world 81...all rock types and in most countries. CHALCEDONY Agate (light to dark colours in concentric bands, translucent)...translucent), fire agate (dark agate with play of colour similar to that in opal, opaque), moss agate (pale yellow...fine quartz crystals come from the State of Minas Gerais, Brazil, and occur in vugs or pockets which are...the categories Silex or Kieselstein (including agate, flint opal), Petrosilex or Halleflinta (for jasper |  | | Journal (issue) | | PRECIOUS GEMSTONES, AGATE CAN C) BE USED AS A POLISHER IN INDUSTRY z The colour of agate is highly variable...combinations of all these colours. m VARIETIES OF AGATE I Agate is an impure form of chalcedony. Chalcedony...that forms in micro- ⢠scopically small crystals. Agate is distinguished from chalcedony by its characteristic...gemstone. These bands are not usually visible when the agate specimens are first removed from the ground (many...in form. The best of these patterns can make the agate extremely valuable as a decorative gemstone. There |  | | Catalog/List | | piece of what is sometimes known as âMarcasite Agate.â This semi-precious stone is also known as âFools...com/5386 72054 Blue Calcite Sphere Stone Source: Brazil This huge orb appears almost as a group of lufy...Source: Brazil This Rhodonite sphere has a rich dark red coloration as it was mined in Brazil. This type...$500 72060 Emerald Sphere Stone Source: Bahia, Brazil Emerald is one of the âBig Threeâ making it one...Amethyst Sphere Stone Source: Rio Grande do Sul, Brazil This incredibly large Amethyst sphere is eye-catching |  | | Book | | Acknowledgments vii Part 1 Introduction Actinolite Agate 1 Cameo 55 55 Alabaster Alexandrite 58 58 ...materials Quartz crystals from Corinto, Minas Gerais, Brazil. Height: 15 cm. Sorbonne collection using...crys- Washing diamond-bearing gravel in Minas Gerais, Brazil. Photo: tals of such minerals as quartz...the phrase ââgem qualityâ to de- from Salinas, Minas Gerais, well as an ââornamental stone.â Amethyst...and a jeweler might then speak of a ârootâ as Brazil Length: 9 cm. K. Proctor collection, United States |  | | Journal (issue) | | Urals. Crystal 25x 17x 17mm. J& 60/13411. Agate (onyx) ?Brazil]. 6x 5 CM.N2 636/3292. Hofmann collection...Hungary, the Harz, Italy, Tirol, Saxony, Switzerland, Brazil, North America, Sitka Island, and Manila (Philippines)...Buena; Huallapon 104- Huanzala 105- Cerro de Pasco; Minas Ragra; M orccocha 106- Huancavelica 107- Corocoro...specimen. Photo: N. Pekova. 6. Euclase. Minas Gerais, Brazil. Crystal 8 mm tall. 1.V.& N . Pekov specimen...Keokuk, Lee Co., Iowa, USA: ! agate; goethite; millerite â011ie â in agate geoda; !! quartz â geodes 5-75 |  | | Book | | colors. These make up the chalcedony group. In the agate type of chalcedony, the banding is very obvious;...Beryl/Aquamarine (Teofilo-Otoni, Minas Gerais, Brazil): 12 cm. 2 - Muscovite (Minas Gerais, Brazil): 30 cm. 20 r.v-^â...emeralds, beryls are minerals from pegmatites. In Brazil, a geode measuring 45 x 25 x 15 yards has been...1 - Beryl/Morganite (Corrego-do-Urucum, Minas Gerais, Brazil): 25 cm. 2 - Beryl/Heliodorus (Siberia,... USA): 1 cm. 3 - Topaz (Virgen de Lapa, Minas Gerais, Brazil): 6 cm. 11 24 b|r Tourmaline The composition |  | | Journal (article/letter/editorial) | | Education of Minas Gerais, Mechanical Engineering Department, Belo Horizonte, MG, Brazil (Received 26...with 80 mL of distilled water was placed in an agate vessel containing 22 Ă 10-mm zirconia balls. The...Materials Research Congress (H.A. Calderon, A. Salinas-Rodriguez & H. Balmori-Ramirez, editors). Cambridge |  | | Catalog/List | | â MATCHED PAIR Rio Grande do Sul, South Region, Brazil This organically shaped Amethyst geode has two...in half to create a matched pair; with polished agate edges, it has excellent purple color and large gemmy...âjewel boxâ has been finely polished to expose the agate exterior with its striking blend of orange, green...purple amethyst to white quartz to a fine grey agate. In fine condition, the âporta joiaâ base measures...exteriors, and was perfectly split in half. The banded Agate edge has been skillfully hand polished to a high |  | | Journal (issue) | | smoky, 39.5 cm high. Berilo Branco mine, Minas Gerais, Brazil. Ex Hoppel collection. M. Mauthner photo;...Butterfields. 14 Ads MINERALS ISSUE #8 XVIII LwĂłwek Agate Summer Crystal Days 17-19 July 2015 LwĂłwek ĂlĂ ski...Morocco", mineral fair, agate cutting, private collections, slideshows, lectures, agate field trips, concerts...parents support your hobby? Gypsum, 3.1 cm high. Las Salinas, Peru. A. Schauss collection. J. Scovil photo....specimens. Euclase, 3.7 cm high. Ouro Preto, Minas Gerais, Brazil. A. Schauss collection. J. Scovil photo |  | | Catalog/List | | Maria do Jetiba, Espirito Santo, Southeast Region, Brazil Smokey scepter Quartz with extreme development...TERMINATED QUARTZ ON QUARTZ Diamantina, Minas Gerais, Southeast Region, Brazil Double-terminated, water clear...âLEMURIANâ QUARTZ PHANTOM JequitaĂ, Minas Gerais, Southeast Region, Brazil Water clear Quartz prism with an...QUARTZ WITH PHANTOM Diamantina, Minas Gerais, Southeast Region, Brazil A single Quartz crystal with pyramidal...CLEAR QUARTZ GROUP Diamantina, Minas Gerais, Southeast Region, Brazil A large number of doubly- terminated |
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