 | | Book | | agents in industry, or strategic purpose, as with quartz crystals in radioelectronics, a further objective...Maranhao, Para and Piaut. Open pit emerald mining in Santa Terezinha de Goids, state of Gotds, 1981. With...in Brazilian gems. Ironically, though, it was quartz and mica, the settings within which today’s most...prospecting thoughout the country. The finest examples of quartz and mica are found in pegmatites — coarse-grained...Carnajba in Bahia state and, more recently, in Santa Terezinha de Goids in Goids state. The role of the |  | | Book | | deposits 508 Qistrict of Sao Jose da Safira, Agua Boa, Santa Maria do Suai;uf and Marilac 509 Lavra do Cruzeiro...Aricanga 516 Lavra da Pederneira 526 District of Santa Rosa, Francisc6f olis 534 District o Golconda, Governador...619 The large quartz family 624 Rock crystal 630 Citrine 633 Smoky quartz 636 Rose quartz 641 Exceptional...Exceptional amethysts 653 Quartz with inclusions 656 Rutilated quartz 661 The chalcedony 665 The fascinating...phanerozoic sedimentary basins: geodes of amethyst quartz, agate, zeolites, apophyllite, silicified anhydrite |  | | Journal (issue) | | tax • • 7.50 Heulandite, Iceland. Xld. on drusy Quartz. 3 x 2 1/2 x 1 ½ . • . . • • • • • . • • 2.00 Cacoxenite...¾ x t ½. . . . . t.50 Colu1ite, Butte. Mass on Quartz. 1 ¾ x 1 ½ . . . . . . . . . . . • . . • . • ..... . . . . . . . 2.00 Artentite, Butte. Xld. on Quartz w . Pyrite. 2 x 2. . . . . . . . . . • • • • ....3.00 Tetrahedrite, Bolivia. Xld. and massive on Quartz. 4 x 2 ½ x 2. • . • • • . 4.00 Niccolite, Ontario...lilac & yellow banded twin xis. about 1 ¼" with Quartz & Calcite. 3 x 2½ x 2 ½ . Very choice. • • • • |  | | Book | | MineralogicalRecord.com I IIMORIITE-(Y) EUROPE FRANCE Trimouns quarry, Luzenac, Ariege. Operated for talc since the beginning...beginning of the 20th century, the Trimouns quarry became well known to collectors around 1990 for the...Litchfield County, where good crystals were taken from quartz veins in a variety of metamorphic, plutonic and...Litchfield, where a mass of white quartz on a ridge had once been mined for quartz, and large ilmenite masses...ilmenite crystals to 7 .5 cm in matrix of massive quartz from these dumps-adding that, in his judgment, |  | | Journal (issue) | | gem abstracts| Margaritologia pearl newsletter|Santa Fe Symposium proceedings|Fei cui testing in Hong... France; Rui Galopim de Carvalho, Portugal Gemas, Lisbon, Portugal; Lee A. Groat, University of British...margaritologia.de. Santa Fe Symposium Proceedings Papers from 22 presentations delivered at the 2017 Santa Fe Symposium...(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 |  | | Journal (issue) | | Institute of America Gem Trade Laboratory, Inc., Santa Monica, California, USA Abstract A method for obtaining...apatite in spinel and corundum, and biotite in quartz. Conclusion Although the inclusion in spinel focused...fractions are: are: amethyst, amethyst, aquamarine, smoky quartz, tourmaline In Brazil, chrysoberyl is prospected...prospected for in the aquamarine, garnet, garnet, smoky quartz, topaz, topaz, tourmaline and, and, in in lesser...amount: amount: andalusite, andalusite, rose rose quartz, quartz, moonstone, moonStates of of Minas Gérais, |  | | Report (issue) | | iron-formation consisting of alternating hematite- and quartz-rich laminae, is present throughout this region...mineral assemblages of chlorite, white mica, and quartz and small grain sizes in itabirite and iron-formations...Structure canga is itabirite from which most of the quartz has been leached, in which most hematite has been...itabirite has been softened by the leaching of quartz and may be slightly enriched by limonite. Total... 20° 00' 15; QUADRANGLE NAMES 1 Itabira 2 Santa Luzia 3 Serra da Piedade 4 Antonio dos Santos 5 Cocais |  | | Book | | 120) Page 6: Mimetite (see page 139) Page 248: Quartz (amethyst variety), Erongo Mountains, Namibia *...Earth’s crust are composed ofjust a few minerals; quartz and the feldspar group are the most abundant processes...growth, as exemplified by tourmaline in schist, quartz or phlogopite. Space for Growth Cavities in rocks...about the same time, as happens with pyrite and quartz, or they may have grown one after the other, as...protect and preserve them. Rutile inclusions in quartz are a good example. Growth in Veins Veins are |  | | 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 |  | | Report (volume) | | Central zone._____________________________________ Quartz-core lenses_________________________________ Asymmetrical...large book from Cruzeiro No. 1 pegmatite, near Santa Maria do Suassuf_________________ 36. Sketch of...Divisao de Fomento in 1944 are: Avulso 53. Mica near Santa Maria do Suassuf, by T. G. Murdock and C. E. Hunter...these municipios Governador Valadares, Peganha, Santa Maria do Suassui, Conselheiro Pena, and Espera Feliz...including the Carrapato, Kochedo, Serra Negra, Santa Therezinha, Uniao, Paraiso da Barra, and Palmital |  | | Report (issue) | | of Ba$ao granites to Minas SeriesDike rocks and quartz veins____________________ Granodiorite dikes and..._______________ Amphibolitic rocks________________________ Quartz veins.______________________________ Surficial...various facies of granodiorite and granite gneisses, quartz diorite, and granite. Age determinations by the...gneiss, in turn, is encircled by the Cachoeira do Campo granite, micas from which yield ages ranging from...The "mixed ages" obtained from the Cachoeira do Campo granite reflect the transformation of older rocks |  | | Book | | Diseases of the Epilepsy, 124 Russia, 73 132 Portugal, 134 England, 134 United States and Canada...Names of Beryl, 611 Derivations of Names and Portugal, 490 Republic of South Africa, Romania, 549...and Germany; NY; Prof. Sklar, Oceanside, Rio Santa Monica, Liddicoat, Dr. Dr. Josephine A. Van... But if antiquities, so an and scriptions quartz] “it of a to seems only two that be For...pearl, zircon, coral, soberyl, garnet, carnelian, quartz, and 10 as The shown gems on a emerald |  | | Report (issue) | | Iron-formation, ____________________ Quartz-dolomite and quartz-ankerite rock_ __________________________...dikes__________________________ Quartz veins.____________________________ Quartz associated with steatitic...quartz__________ Quartz as metamorphic segregations___ Gold-bearing hydrothermal quartz veins- Page A38...____ Major folds______________________________ Santa Rita syncline_______-_____________ Dom Bosco sy...Minas Gerais, Brazil. 2-10. Geologic maps: 2. Santa Luzia quadrangle, by B. P. Alves. 3. Serra da Piedade |  | | Report (issue) | | quartz_________________________________-_-_--__-__----_-_-_-_---Quartz crystal containing carbonate rhombohedrons_---...intruded both the Rio das Velhas and the Minas series. Quartz veins are common. The Rio das Velhas series was...95 percent hematite. Minor amounts of magnetite, quartz, talc, pyrophyllite, phosphorusbearing minerals...believed to have been formed by replacement of the quartz in itabirite by hematite leached from the surrounding...10 11 12 13 14 15 16 17 18 19 20 21 Itabira Santa Luzia Serra da Piedade Antonio doe Santoa Cocais Sao |  | | Journal (issue) | | owners of the stones): (1) 2 5 . 4 3 ~ 1aquamarine, Santa Maria mine, Brazil; (2) 20.10-ct peridot, Burma;...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...copies of Gems a ) Gemology to 1660 Stewart St., Santa Monica, CA 90404. Any opinions expressed in signed...Kane and others at the GIA Gem Trade Laboratory in Santa Monica from stone dealers across the country. The |  | | Journal (issue) | | Courtesy of Guy Clutterbuck; photo by Robert Weldon. Quartz—Amethyst, Citrine, and Rose. The states of Minas...Brazil, Madagascar, and elsewhere produced bulk rose quartz. Ruby and Sapphire. The major sources of gem corundum...Eguas, Campo Formoso: Socotó ; Pilão Arcado: Salininha, Pindobaçu: Carnaiba Goiás—Pirenópolis, Santa Teresinha:...Teresinha: Campos Verdes, Santa Teresinha Minas Gerais—Conselheiro Pena: Itatiaia, Hematita, Itinga; Itabira:...Conquista: Cercadinho Espírito Santo—Baixo Guandu: Santa Cruz (Itapina) ; Castelo: Forno Grande; Itaguaçu: |  | | Report (issue) | | Structural geology Detachment faults in the central Santa Monica Mountains, Calif., by R. H. Campbell, R....RESEARCH 1966 DETACHMENT FAULTS IN THE CENTRAL SANTA MONICA MOUNTAINS, CALIFORNIA By R. H. CAMPBELL...Los AngeZes County, OaZif. Abstraot.-The central Santa Monica Mountains are made up of sedimentary and...of the Rort exposed in the core of the Eastern Santa Monica Mountains. Structurally, these strata form...the range. The Santa Monica Mountains trend east-west along the north side of Santa Monica Bay and the |  | | Journal (volume) | | characterization of different polycrystalline materials (i.e., quartz, SiC and α-Al2O3). The crystal sizes determined...their uniform parental material, mainly composed of quartz from seasediment formations (Tables 2 & 3). Table...gas feedstock) were investigated in a fixed-bed quartz micro-reactor. The results indicate that when Ni(NO3)2...Siliceous sedimentary rocks are composed by silica (quartz and opal-CT), aluminium silicates (clay minerals...degree of correlation (R2=0.92), such as for pare of quartz reflection with d=3.34 and 1.82 Å. The similar |
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Santa Luzia quarry, Campo, Viseu, Viseu, Portugal