 | | Journal (article/letter/editorial) | | Mariposa. September/October 1988 387 Figure 4: Group of intertwined wires of silver from Kongsberg, Norway;...407-carat teardrop; both stones are from Minas Gerais, Brazil. A n  other featured strength of the gemstone...5-cm-thick sea-green crystal of aquamarine from Minas Gerais, Bra zil, catches the eye as does an emerald...California; Minas Gerais, Brazil; and Kunar, Afghanistan; as well as yellow beryl (heliodor) from Minas Gerais...Gerais, Brazil, help to fill out the suite. Featured in the same case are the minerals of the tour maline |  | | 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,...Century. The book is a showcase ofthe best from Brazil and it makes a handsome evocation of what is beautiful |  | | Journal (issue) | | total of 6 issues per year by Taylor & Francis Group, LLC, 530 Walnut Street, Suite 850, Philadelphia...Subscription offices: USA/North America: Taylor & Francis Group, LLC, 530 Walnut Street. Suite 850, Philadelphia...7017 5544. Production Office: Taylor & Francis Group, LLC, 530 Walnut Street, Suite 850, Philadelphia...A. Corpier. Copyright © 2024 Taylor & Francis Group, LLC. All rights reserved. No part of this publication...permission from Taylor & Francis Group, LLC. Taylor & Francis Group, LLC grants authorization for individuals |  | | Book | | 22:65-69 [Abstracts of the] FM-TGMS-MSA Symposium on Garnet (chairman: K. J. Wenrich) 24:61-68 Abstracts of...crandallite from the Alto Benedeto pegmatite, Parai'ba, Brazil (by J.P. Cassedanne & L. Barreto) 22: 183-185 ALTO...Burian goyazite from [Alto Bernardino, Paraiba,] Brazil (by J. S. White, Jr.) 12:379 ALUMOHYDROCALCITE...prospect, Minas Gerais, Brazil 21:405-408 --with J.P. Cassedanne: Crystallized rose quanz from Alto da Pitora...Pitora, Minas Gerais, Brazil 21:409-412 --with J. P. Cassedanne: The Jaguara~u pegmatite, Minas Gerais, Brazil |  | | Book | | MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA © 2009 - CARLOS CORNEJO...Lavra do Sapo, Ferruginha, Conselheiro Pena, Minas Gerais. Collection of Alvaro Lucio. Photograph taken...photographs: "Parafba" tourmaline (25 x 6 mm), Sao Jose da Batalha, Parafba. Courtesy of Bruno and Rolando Gioia...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 |  | | Book | | Inquiries should be addressed to Abbeville Publishing Group, 488 Madison Avenue, New York, NY 10022. Printed...contajning a metal and an oxygen-bearing anionic group. For example, calcite is a forn1 of calcium carbonate...materials are presented by mineral species or 1nineral group in an order clustering s.imilar gen1s together....41 Forsterite (see peridot In gems) Mg1SiO, Garnet group (see also gems) Almandine Fe3Al1(SiO,) 142 Spessart1ne...146-147 Hodgkinsornte MnZn 2(SiO.)(OH)i 148 Hum,te group Chondrodite (Mg,Fe>s(SiO,)z(F,OH), 149 Norberg1te |  | | Book | | historical diamonds from India (Golconda), Brazil (Diamantina, Minas Gerais), Congo. Angola and I ,.,mibia were...from Sudbury, Ontario, Canada and Morro Velho, Brazil. Its large accumulations are important Cu ore ...and from Colquechaca, Bolivia. Pyrrhotite, 68 mm, Da/negorsk, Russia Pyrrhotite Fe1-xS (x = 0-0, 17)...Crystals up to 90 mm (3•/,. in) found 10 Virgcrn da Lapa. Brazil Tabular crystals up to 40 mm ( 1• u in) across...cm were found in pegmatites in Jaguara9u, Minas Gerais, Brazil. Crystals up to 20 cm (7 7/a in) in size |  | | Book | | historical diamonds from India (Golconda). Brazil (Diamantina, Minas Gerais), Congo. Angola and Namibia were found...from Sudbury, Ontario, Canada and Morro Velho, Brazil. Its large accumulations are important Cu ore Cubanite...Crystals up to 90 mm (37.<, in) found in Virgem da Lapa, Brazil. Tabular crystals up to 40 mm (17is in)...cm were found in pegmatites in Jaguaragu, Minas Gerais, Brazil. Crystals up to 20 cm (77« in) in size reported...Africa 79 Chrysoberyl, 35 mm. Espirito Santo. Brazil Chryzoberyl BeAf204 ORTHORHOMBIC • • • Varieties: |  | | Journal (issue) | | ...651 by C. J. Stefano & J. K. Brizendine The Garnet Ledge almandine deposit near Wrangell, Alaska ...you to become a Fellow and join this important group. Wear the medallion with pride! Contact Tom Gressman...Center, and in 1974–1978 as Manager of the Devonian Group of Charitable Foundations. In 1979 he was hired...high school Russell joined an informal science group involved in mineral collecting; they took field...numbered thumbnail collection into three groups. One group was his reference collection of over 3,000 specimens |  | | Journal (issue) | | Devonian-age 0 Smoet formation and Triassic-age Tadeth Group that Berrange and Jobbins (1976)discuss in their...the surface. The basalts contain augite, pyrope garnet, calcic plagioclase, zircon, spinel, and magnetite...the samples studied, no inclusions of almandite garnet or rutile were observed. Yellowish anhedral hexagonal...has also been observed in certain varieties of garnet, corundum, spinel, kyanite, fluorite, and monazite...Lanka and those recently discovered in Zimbabwe, Brazil, and Tanzania. The Brazilian specimens usually |  | | Book | | rocks contain large crystals, often of the feldspar group and are known as porphyries. The individual crystals...are the home of a number of interesting minerals. Garnet, staurolite and andalusite are typical minerals...minerals change. A number of silicate minerals such as garnet and epidote and some sulphides giving metallic...contact metamorphism. Fine crystals of vesuvianite, garnet, scapolite and spinel can be found in altered limestones...other books that a serious attempt to describe and group minerals could be seen to be in progress. His De |  | | Book | | Watson, Trimble and Cowgill, 1977). LATINAMERICA BRAZIL Jacupiranga mine, Sao Paulo. Among the crystallized...columnar crystals of hedenbergite. Around 1960. a group of collectors visited the mine. then temporarily... Orlandi and Vezzoni, 2013 ). A beautiful 8-cm group of ilvaite crystals spotted with tiny crystal!>...ilvaite crystals to 1 cm occur in pockets in pyroxene-garnet skarn zones, and very large, somewhat rough crystals...Alto Piano region of northernmost Argentina, a group of mines exploits playa lake deposits of borate |  | | Book | | Toronto, Ontario, Canada. Illustrations: Crowle Art Group Note: For illustrative purposes, some images in...cm Page 251: Calcite, Irai, Rio Grande do Sul, Brazil * 12.5 x 10 x 10.5 cm Page 252: Gypsum rosette...of just a few minerals; quartz and the feldspar group are the most abundant species. These are the major...environment. solidified. In some basalts of India and Brazil, these cavities are large enough for a person...before it ABOVE: Imperial topaz, Ouro Preto, Minas Gerais, Brazil * 3.3 x 2.7 x 1.8 cm, 159.10 ct RIGHT: Round | | | Book | | Miguel Hortiguela, LPPO Illustrations: Crowle Art Group Printed in China The publisher gratefully acknowledges...cm Page 251: Calcite, Irai, Rio Grande do Sul, Brazil * 12.5 x 10 x 10.5 em Page 252: Gypsum rosette...ofjust a few minerals; quartz and the feldspar group are the most abundant processes — called biominerals...environment. solidified. In some basalts of India and Brazil, these cavities are large enough for a person...before it ABOVE: Imperial topaz, Ouro Preto, Minas Gerais, Brazil ° 3.3 x 2.7 x 1.8 om, 159.10 ct RIGHT: Round |  | | Book (edition) | | Example of pseudomorphism: limonite after pyrite (Brazil) transformations are possible in the laboratory...swell and emit bubbles (zeolite group, epidote group, scapolite group), some shed flakes (vermiculite...mineral is part of an isostructural mineral group, the group is listed in parentheses after the mineral...class: Almandine, Silicates (nesosilicates, garnet group). A specific problem is posed by the silicates...occurs solely at the apices of the tetrahedral 4 group [SiCU] ", and the differentiation of the groups |  | | Catalog/List | | red-orange color • An extremely large 21.33-carat Garnet from Tanzania arguably the finest Mahenge has ever...Gemstone: Rhodolite Garnet - 3.85 Cts. Tanzania This nearly 4 carat Rhodolite Garnet offers an undeniably...Gemstone: Rhodolite Garnet - 4.41 Cts. Tanzania This impactful Rhodolite Garnet packs a punch. The kite...kite shaped Garnet has incredible “Mahenge” color. The pinkpurple-red hue is stunning, well-balanced and...Bid: $500 72003 Gemstone: Tourmaline - 4.38 Cts. Brazil This striking Tourmaline is sure to catch anyone’s |  | | Journal (issue) | | agate nodule showing alternate red and white bands (Brazil). Below: Agate pebbles from a river in Peru. Agate...made of silica and is a member of the silicate group of minerals and gemstones. Like quartz, of whic...have been discovered in the last hundred years in Brazil and Uruguay. Other plentiful deposits of agate...across the gem surface. Onyx is very popu lar in pe n da n t s an d i n brooches on which designs are cut...mixing or grinding is carried out.) FILE AGATE Group: Silicates Crystal system: Trigonal Chemicalformula: |  | | 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...to the chemical formula, allegiance to a mineral group, symmetry and crystal structure as well as the strongest...chemical formula, structure (crystal system, space group, and unit cell dimensions), and at least some other |  | | Journal (issue) | | Mulligan Peak (AZ) Purple Agate Collecting Quartz in Brazil Bob Jones’ 2014 Tucson Experience Birthstones...metallic sulfides we call “pri mary min erals”. This group of brightyellow crystals is from the Cozzo Disi...Bob Farrar A quartz crystal-hunting adventure in Brazil Yellow menace, yellow masterpiece by Bob Jones...SMITH, ARKANSAS: Wholesale and retail show; Exhibit Group International; Fort Smith Convention Center; 55...of sulfur, such as in medicine. Sulfonamides, a group of synthetic antibiotics, are just one example. |  | | Journal (issue) | | Benesch and B. Wohrmann Mineralogy The tourmaline group: a resume.........................................419 by C. R. Marcusson COVER: Tourmaline crystal group 9 cm long, with albite and lepidolite, mined recently...Locality —Minas Gerais, Brazil (by J. S. White) [1970, vol. 1, no. 2, p. 73.] Locality —Minas Gerais, Brazil:...Uvite, a new (old) common member of the tourmaline group and its implications for collectors (by P. J. Dunn...301-308.]* New tourmaline discovered in [Itatiaia] Brazil (by A. Lallemant) [1978, vol. 9, no. 5, p. 298-299 |  | | Book | | a mineral belonging to the actinolitetremolite group having the nature of an asbestos. cabochon a gemstone...some emerald, quartz and garnet • anatase in rock crystal • apatite in garnet, kornerupine, corundum and... Formation of inclusions 5 • epidote in rock crystal • garnet in corundum • hematite in topaz and euclase • •...emerald rutile in quartz spinel in ruby zircon in garnet, corundum and kornerupine Many of these minerals...apatite so often found in corundum and hessonite garnet are recognized by their well-formed appearance | | | Book | | a mineral belonging to the actinolitetremolite group having the nature of an asbestos. cabochon a gemstone...some emerald, quartz and garnet • anatase in rock crystal • apatite in garnet, kornerupine, corundum and...inclusions • • • • • • • • 5 epidote in rock crystal garnet in corundum hematite in topaz and euclase mica:...apatite so often found in corundum and hessonite garnet are recognized by their well-formed appearance...reflect earlier phases of their host's development. Garnet may be seen in diamond crystals and examination |  | | Journal (issue) | | 239 Articles The Jaguaragu pegmatite, Minas Gerais, Brazil ............................. 165 by J....Calvo COVER: BERYL, a spectacular, 9-cm fan-shaped group of crystals on white calcite matrix from the Coscuez...weeks for delivery. Sorry, no credit card orders or group discounts. he Mineralogical Record, volume 25,...District in Peru, Indian M tn. (A L), C apelinha (Brazil) O r d e r F ro m : P o stag e $1 p e r c o p...Universitaria, Ilha do Fundao 21.190 Rio de Janeiro, Brazil Jeanete N. Alves Departamento de Recursos Minerais-RJ |  | | Journal (issue) | | you to become a Fellow and join this important group and Wear the medallion with pride! Contact Tom...enthusiastic collectors, and they formed a close-knit group of lifelong friends who went on to meet regularly...2022 always intrigued by what they found. One fun group activity was to visit the late Bart Cannon at his...over the years. They always felt it was a great group of people to work with, and their lives were immensely...fine specimen in an old museum collection, the group settled on the Spruce area in Washington. John and |  | | Journal (issue) | | multi-stars in other minerals, especially in spinel and garnet, on the other hand, is well understood (Switzer...intersecting at angles of 60° to each other is due to one group of three sets of oriented needle-like inclusions...perpendicular to the c-axis; one group of needles (designated group B) is inclined at an angle of 24...the stars are indicated by black dots: (a) one group of needles (A, three light bands) forms a six-rayed...caused by three sets of inclusions (designated as group A) with an orientation perpendicular to the c-axis |
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