 | | Journal (article/letter/editorial) | | University Auburn, Alabama 36849 cookrob@auburn.edu Euclase La Marina Mine, Municipio de Pauna Boyacá, Colombia...minerals after beryl and chrysoberyl. Exceptional euclase specimens appeared at the 2016 Tucson Gem and Mineral...selection of this issue’s Connoisseur’s Choice. Euclase, BeAlSiO4(OH), is a chemically simple nesosilicate...Lacking essential chromophores in its formula, euclase is ideally colorless with a white streak, but in... or pale to deep blue. It is not fluorescent. Euclase occurs only as crystals that belong to the monoclinic |  | | Journal (article/letter/editorial) | | EUCLASE By RICHARD A. KOSNAR Downloaded by [JAMES COOK UNIVERSITY] at 19:54 24 August 2017 36 Osborn...Osborn St., Keyport, N . J . 0 7 7 3 5 Euclase is one of the rarest pegmatite gem minerals, and has never...pegmatite at Santana do Encoberto in the Sao Sebastao de Maranhao district of Minas Gerais, Brazil has produced...what have proved to be some of the finest gem euclase crystals ever found anywhere in the world. They...(yellow), and lilac-pink apatite crystals. These euclase crystals range in size from micro to an inch or |  | | Journal (issue) | | Jordan Root photo. Back cover: Top row, from left: Euclase, 2.3 cm, from the Gachalá mine, Guavió-Guatéque...kunzite), 9 cm, from the Urucum mine, Galiléia, Minas Gerais, Brazil. Gus & Jane Eifler collection; Holly Smith...Democratic Republic of the Congo. Joe Budd photo. Euclase, 5 cm, from the La Marina mine, Boyaca Department...Topaz, 15 cm, from Hematita, Antonio Dias, Minas Gerais, Brazil. Tom Spann photo. (below right) Spinel... Aquamarine, 9 cm, from Corrego São Francisco, Minas Gerais, Brazil. Tom Spann photo. Rhodochrosite on |  | | Book | | Professor Jacques P. Cassedanne Universidade Federal do Rio de Janeiro For his valuable participation in...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, |  | | Journal (issue) | | the CapelinhaMalacacheta Area (State of Minas Gerais, Brazil)..........................................Smithsonian I know what the Institution can and will do with col lections. While the Smithsonian is certainly...one logical place for collections to be given, I do not believe that all collections and every thing...control of heirs who are not interested in them and do not know how to dispose of them pro perly. This...concrete. We don’t endorse this procedure but we do recommend either of the following two basic courses |  | | Journal (issue) | | Lanka) and several fine brown gem tourmalines from Brazil prompted the author's interest in examining the...D C D " * ' ' - ' Q cp co CD co in co o m r^ J ? do cb cô cô CD ob CD CD CÔ ...distinguishing characteristics, in this case there do not appear to be any of the usual gemmological techniques...someone with facilities to undertake this study will do so. The question which now remains is as to the nomenclature...natural-coloured stone is found in Brazil (Goyaz, Bahia, Rio Grande do Sul), Madagascar, Russia, Spain, |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...tourmaline (84 x 26 mm), Lavra do Sapo, Ferruginha, Conselheiro Pena, Minas Gerais. Collection of Alvaro Lucio...(Camara Brasileira do Livro, SP, Brazil) Cornejo, Carlos .Minerals & precious stones of Brazil. Carlos Cornejo...pedras preciosas do Brasil Bibliography 1. Gemology 2. Geology 3. Minerals - Brazil 4. Minerals- Classification... Mineralogy 6. Mineralogy - Brazil - History 7. Precious stones - Brazil I. Bartorelli, Andrea. II. Title |  | | Journal (issue) | | a t certain samples of emerald-beryl from Novello do possess prominent negative crystals and two-phase...37.31 (106)]. Exactly what was the sardion fish I do not know. Sarda became a very general name not only...aluminium fluosilicate. Natural red stones from Brazil have been found occasionally and it is possible...have the power to reflect objects just as mirrors do. "Aethiopian" smaragdi, according to J u b a , were...of sapphire leading up to it, though most people do not believe it. It is a marvellous stone, very beautiful |  | | Book (edition) | | Salinas, Peru, H Variscite, xx 5 mm, Iturnbiara, Brazil, H Rhodocbrosite, polished, 50 mm, Capillitas,... China, H Page 1: MuscO\ite. 45 mm, Linopolis, Brazil, H Page 2: Vivianite, I 00 mm, Huanzala, Bolivia...Ethiopia, G Page 12: Brazilianite, 35 mm, Linopolis, Brazil, H Page 13: Gold, 35 mm.Eagle's est Mine, California...mine. Edwards. St. blue masses at Brumado Bahia, Brazil. At SchneeLawrenceco.. NewYork.andon LakeHarbour...Mts., Germany. ~n Au veins_at Mo1To Velho. Minas Gerais, Brazil. With tourmaline, muscovite-fuchsite,apatite |  | | Book | | incompletely characterized hydromicas-these nebulous species do not form visible crystals and in themselves are never...Watson, Trimble and Cowgill, 1977). LATINAMERICA BRAZIL Jacupiranga mine, Sao Paulo. Among the crystallized...Remedios mine, although generally Taxco ilvaite crystals do not exceed 6 mm (Des Revieres and Beals, 20 l l )...(1995: 477). Inesite crystals from the Hale Creel mine do not remain bright pink, unfortunately: as their manganese...unaltered inyoite crystals from the Mount Blanco mine do not exceed 2.5 cm (Rock Currier, personal communication |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | of detail and complexity required by the format to do of the seventh edition of System was too daunting...Connecticut. Luiz A. D. Menezes: Belo Horizonte, Minas Gerais, Brazil. William C. Metropolis: Mineralogical Museum...a portion of the unit cell; constraints of space do not always allow showing the true cell repeats or...perspective for their position as shown. Thus they do not show the exact orientation of the center of the...to be widely spaced relative to cleavage and which do not occur everywhere within a specimen. Parting may |
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Santana do Encoberto, São Sebastião do Maranhão, Minas Gerais, Brazil