 | | Journal (issue) | | a n d Peter C. Keller Gem Pegmatites of Minas Gerais, Brazil: The Tourmalines of the Governador Valadares... Editor Alice S. Keller 1660 S t e w a r t St. Santa Monica, C A 90404 Telephone. 12 13) 829-299 1 Editorial...St., Santa Monica, CA 90404. Application to mail at second class postage rates is pending in Santa Monica...copies of Gems if) Gemology to 1660 Stewart St., Santa Monica, CA 90404. Any opinions expressed in signed...assistant, at the Gemological Institute of America, Santa Monica, California. Acknowledgments: The authors |  | | Journal (issue) | | Hawthorne & W. W. Pinch Fifty-nine treasure hunts in Minas Gerais . . . . . . . . . . . . . . . . . . . . . ....BERYL crystal (variety morganite) on albite matrix, 6.6 cm, from Conselheiro Pena, Minas Gerais, Brazil...Jeff Scovil photo. For more on the minerals of Minas Gerais see Guido Steger’s memoirs in this issue. The...in that area, and later purchased a quantity of rock for lapidary use which he had shipped to Canada...Toronto Technical College. He learned that the Tsumeb mine in South-West Africa was producing some very beautiful |  | | 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,...the Cruzeiro tourmaline and mica mine and the Jacobina amethyst mine. He owns several other mines as well |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...EDITING Courtesy of Ian McReath Spine photograph: Crystal of multicolored tourmaline (84 x 26 mm), Lavra...Lavra do Sapo, Ferruginha, Conselheiro Pena, Minas Gerais. Collection of Alvaro Lucio. Photograph taken by...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 |  | | Journal (issue) | | gem abstracts| Margaritologia pearl newsletter|Santa Fe Symposium proceedings|Fei cui testing in Hong...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,...Collins, King’s College London; John L. Emmett, Crystal Chemistry, Brush Prairie, Washington, USA; Emmanuel...blood ruby, royal blue and cornflower sapphire, old mine/ Muzo green emerald, sunrise and sunset padparadscha |  | | Journal (article/letter/editorial) | | Laboratory, Carlsbad, California BRAZIL IMPRESSIONS: I have only been to Brazil twice, but 1 did see a lot...most expensive real estate. While on a tour in Brazil in the early 198Os, our bus was stopped by the...begging everyone’s forgiveness. My second trip to Brazil was in 1987 as a member of the International Gemological...Conference group. I had a wonderful time on both trips. Brazil is a beautiful country, one full of contrasts....Fallbrook, California FIRST TRIP TO BRAZIL: I have a number of memories of Brazil, but perhaps the most vivid |  | | Book | | until he managed to reach the land of his dreams, Brazil. A specialist in the field of geology and mineralogy...Honoris Causa. Deeply convinced that every giant crystal is like a “stone book” carrying in it invaluable...collector's passion and his undying love for the crystal phenomena of minerals are the basic stimulus for...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 |  | | Catalog/List | | invited. ABBREVIATIONS used in this catalog xl -crystal xlled -crystalled xlline - crystalline xllized...············································ 28 ROCK AND MINERAL COLLECTIONS······················-·...sodium and iron California San Benito River, Gem mine Black prismatic xls imbedded in syenite CROSSITE...iron silicate California San Benito County, Gem mine Compact blue-gray mass with natrolite ..... . GRUNERITE...GRUNERITE Basic iron silicate Michigan Champion, Spons mine White-tan fibrous aggregates in magnetite with stilpnomelane |  | | Journal (issue) | | Dunn Washington, DC Dennis Foltz Santa Monica, C A Chuck Fryer Santa Monica, C A C. S. Hurlbut, Jr. Cambridge...Cambridge, MA Editor Alice S. Keller 1660 Stewart St. Santa Monica, CA 90404 Telephone: 12131 . . 829-2991 Editorial...A Robert E. Kane Los Angeles, C A John Koivula Santa Monica, C A Henry 0. A. Meyer West Lafayette, Indiana...Angeles, C A Ray Page Santa Monica, C A George Rossman Pasadena, C A James E. Shigley Santa Monica, C A SUBSCRIPTIONS...St., Santa Monica, CA 90404. Application to mail at second class postage rates is pending in Santa Monica |  | | Catalog/List | | t::_: •.·'':{}j;,·}~t' MM - T 'N Fl. P. R. - crystal crystalled crystalline crystallized micromount......... Utah Toelle County, Gold Hill, Gold Hill mine ~ransparent micro crystals on gossen with minor...silicate Arizona Pima County, Ajo, New Cornelia mine Sky blue micro xls and coatings on monzonite .....Derby mine White xlline lamellar mass with minor lepidolite . Virginia Amelia, Rutherford mine !r2 Lustrous...crystalline mass, some crystal vugs ALTAITE Lead telluride Colorado Saguache County, Klondike mine Cleavage plates |  | | Journal (issue) | | Cover 3. Diamond. Curve faced rhombododecahedral crystal (7 mm). Specimen 19 from collection of Almazy ...Bogomolov. Cover 4. Marialite. Kukurt, EPamirs. Large crystal 5cm MIL Specimen: A.M. Skrigitil'. Photo: M. Leybov...animals "[3]. Ontogenic point of view. A growing crystal is a system, and, although not living, it is self-organizing...From the ontogenic point of view each natural crystal is considered a separate specient of the mineral...and dendrites? From what moment does a splitted crystal cease to be Nate: "- St. Petersburg University |  | | Journal (issue) | | Articles Famous mineral localities: the Taewha mine, K orea...........................................and barbosalite from Lavra do Criminoso, Minas Gerais, Brazil ..........................................mimetitefrom the San Francisco mine near Magdalena, Sonora, Mexico. The large crystal is 28 mm across. Collection...Mineral Society for making the hall avail able to us; Rock Currier for his interesting lecture which led off...America, Michael Waitzman and D. Vincent Manson (Santa Monica, CA) Joseph R. Glover (Phoenix, AZ) Golden |  | | Book (edition) | | is, chemical formula, physical properties, crystal system, and most important to you as a collector...which we cannot possibly deal with at length here— crystal structure. CrysraLLoGRAPHy is a whole sub- division...property material Merely to develop a solid crystal body, into crystals. often which which What...What displaying gives each allows the is a crystal? plane natural surfaces called faces, which reflect...balance. Growing space is usually limited and crystal growth frequently is hindered. Consequently, minerals |  | | | | that is, chemical formula, physical properties, crystal system, and most important to you as a collector...which we cannot possibly deal with at length here— crystal structure. Crystallography is a whole sub¬ division...the mineral as well as to reveal characteristic crystal shapes and forms. | The atoms making up minerals...the material to develop into crystals. What is a crystal? Merely a solid body, often displaying plane natural...balance. Growing space is usually limited and crystal growth frequently is hindered. Consequently, minerals |  | | Catalog/List | | Micromount and Fluorescent columns . PETROLOGIC (ROCK) SPECIMENS ....... MINERAL DETERMINATION SUPPLIES...SUPPLIES including Blowpipe Testing.......... . xl - crystal xlled - crystalled xlline - crystalline xllized...VANADINITE Apache mine, near Globe, Gila County, Arizona. Sharp hexagonal barrel-shaped crystal druse. Many...mina Ojuela. White-to-pale yellow sheave-like crystal FI. 1. 00 groups on limonite ................ Mexico...... . Fl. Utah Toelle Co., Gold Hill, Gold Hill mine. .50 2.50 Transparent xls on limonite with austinite |  | | Report (issue) | | Colorado Beryl Collecting Mark I. Jacobson Page 14 Crystal Structure of Beryl and Pezzottaite William "Skip"...August Breithaupt had his seal carved into a beryl crystal. Breithaupt began his studies in 1811, during A...refer, rather than to a given species, to the crystal properties of clarity and luster. The French term...crystals from various alluvial deposits; the largest crystal is about 4 cm wide Collection Eckehard Petsch ...beryl is typically given as Be3 Al2 Si6O 18. The crystal structure consists of Si6O 18 rings, which are | | | Journal (issue) | | Articles Famous mineral localities: the Taewha mine, Korea ...........................................barbosalite from Lavra do Criminoso, MinasGerais, Brazil ........................... 147 by P. J. Dunn,...from the San Francisco mine near Magdalena, Sonora, Mexico. The large crystal is 28 mm across. Collection...Mineral Society for making the hall avail able to us; Rock Currier for his interesting lecture which led off...ofAmerica. Michael Waitzman and D. Vincent Manson (Santa Monica, CA) Joseph R. Glover (Phoenix, AZ) Colden |  | | Book | | This book provides a basic introduction to the crystal structure of minerals, as well as illustrations...cm Page 251: Calcite, Irai, Rio Grande do Sul, Brazil * 12.5 x 10 x 10.5 em Page 252: Gypsum rosette...pressures and temperatures. Immense quantities of rock and their constituent minerals are altered and destroyed...crystals are considered to be a mineral called crystal structures. Natural crystals formed by geological...laboratory-grown (synthetic) because they grow in rock. crystals, although identical to their natural |  | | Book | | information b Book review c Crystal morphology information d Crystal drawing ff Continues on following...On a spectacular find of crocoite in the Adelaide mine, Dundas, Tasmania (by A. H. Chapman) 3:111-113 ADOLFSSON...gysinite-(Nd) and other rare minerals from [the Santa Lucia and Sa Duchessa mines,] Sardinia [Italy] (by...AJO Famous mineral localities: the New Cornelia mine, Ajo, Arizona (by W. J. Thomas & R. B. Gibbs) 14:283-298...ALLEN, GEORGE B. --and W. Hunt: The Tonopah-Belmont mine, Maricopa County, Arizona 19:139-144 ALLGOOD, GENNE |  | | Book | | Pefloles, Compania Minera Fresnillo, and Compaii.ia Santa Rosalia, who aJlowed me to photograph, gather samples...specimens from such places as the La Fe Mine in the state of Chiapas and Santa Rosalia in the state of Baja California...places as Mapimi in the state of Durango; Naica and Santa Eulalia in the state of Chihuahua; and Zacatecas...copyright by State University of New York , Albany) Santa Eulalia I 7 Eight of these older districts will...quality specin1ens cherished by the collectors: Santa Eulalia, Chihuahua; Naica, Chihuahua: Mapimi, Durango: |  | | Journal (issue) | | peaks indicate that the impurities are in the crystal structure. The chemical analyses for the orange...from Brazil shows chatoyancy caused by flat hollow channels. Four-rayed star aquamarine from Brazil has...the c-axis. A tourmaline-quartz combination from Brazil has an iridescent chatoyancy Grey orthoclase moonstone...cat's-eye from Brazil A very unusual example of a cat's-eye was purchased in Brazil by the author in...measuring Figure 1: Chatoyant pale blue topaz from Brazil weighing 152.15 ct. Photo by J. Hyrsl. 32.94 x | | | Book | | Pefioles, Compafiia Minera Fresnillo, and Compania Santa Rosalia, who allowed me to photograph, gather samples...specimens from such places as the La Fé Mine in the state of Chiapas and Santa Rosalia in the state of Baja California...places as Mapimi in the state of Durango; Naica and Santa Eulalia in the state of Chihuahua; and Zacatecas...copyright by State University of New York, Albany) Santa Eulalia / 7 Eight of these older districts will...quality specimens cherished by the collectors: Santa Eulalia, Chihuahua; Naica, Chihuahua; Mapimi, Durango; |  | | Journal (issue) | | 1aquamarine, Santa Maria mine, Brazil; (2) 20.10-ct peridot, Burma; (3) 21.09-ct kunzite, Brazil; (4) 8.14-ct...tourmaline, Queen Mine, Pala, California; (6) 15.18-ct tourmaline, Paraiba, Brazil; (7) 10.42-ct tanzanite...38-ct ruby, Burma; (17) 3.08ct tourmaline, Paraiba, Brazil; (18) 1.85-ct fancy purple-pink diamond, Argyle...Sinlzanlzas Editor Alice S. Keller 1660 Stewart St. Santa Monica, C A 90404 Telephone: (800) 421-7250 x25...organization for the jewelry industry, 1660 Stewart St., Santa Monica, CA 90404. Postmaster: Return undeliverable |  | | Catalog/List | | Micromount and Fluorescent columns. PETROLOGIC (ROCK) SPECIMENS .... MINERAL DETERMINATION SUPPLIES including...PHOTOGRAPH: 67 69 70 l\ilICROMOUNT SUPPLIES . xl - crystal xlled - crystalled xlline - crystalline xllized...78-79 79 79 79 VANADINITE specimen from the Apache mine, near Globe, Gila County, Arizona GLOBES AND ATLASES...ATLASES ...... . 79 Sharp hexagonal barrel-shaped crystal druse. Many oi the crystals exhibit a cavernous...mina Ojuela. White-to-pale yellow sheave-like crystal groups on limonite . .. . .. ... .. ... . lVlexico |  | | Journal (issue) | | ........................................... 13 Brazil .................................................Lapidary, Hong Kong; CMP Asia, Hong Kong; GEA, Brazil; Emmanuel Piat, France; Israel Emerald Cutters...DIRECTORS Andrew Cody, Australia Sergio Martins, Brazil Emmanuel Piat, France Constantin Wild, Germany...to improve the color. Some kunzite buyers from Brazil also discovered that rough crystals they purchased...the production is mixed with calcite. The spinel mine at Kuh-i-Lal is being operated by a skeleton crew |
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