 | | Report (issue) | | ver sion 1.2 Crystal Data: Monoclinic. Point Group: 2=m: Crystals typically thin tabular, °attened...494{1.513 2V(meas.) = 30± {49± Cell Data: Space Group: F 2=m: a = 13.595{13.657 ¯ = 90:05 ± ¡90:91 ± Z...5:08 Si 12:82 O36 ² 13:24H2 O: Mineral Group: Zeolite group. Occurrence: A low-temperature hydrothermal...prehnite, calcite, quartz. Distribution: A common zeolite, with many occurrences of large and ¯ne crystals...Guana juato, Mexico. At Rio das Antas, Bento Gon»calves, Rio Grande do Sul, Brazil. From around Gunnedah |  | | Report (issue) | | Publishing, version 1.2 Crystal Data: Monoclinic. Point Group: 2=m: Crystals commonly tabular k f010g, and elongated...2V(meas.) = 0± {55± 2V(calc.) = 34± Cell Data: Space Group: C2=m: a = 17.77(2) ¯ = 116:46(5)± Z = 4 b = 17...)§=1:35 Al2:34 Si6:68 O18 ² 6:50H2 O: Mineral Group: Zeolite group. Occurrence: In cavities in basalts; in... Canada. From near Bento Gon»calves, Rio Grande do Sul, Brazil. Large crystals from the Nasik, Poona...Alberti, A. (1972) On the crystal structure of the zeolite heulandite. Tschermaks Mineral. Petrog. Mitt., |  | | Report (issue) | | Crystal Data: Monoclinic, pseudotetragonal. Point Group: m: Crystals are slender prismatic, may be square...521 2V(meas.) = 36 ± {56 ± Cell Data: Z=8 Space Group: C c: a = 18.508(5) b = 18.981(5) c = 6.527(2)...Al2:00 Si 2: 97 O10 ² 2:99H2 O: Mineral Group: Zeolite group. Occurrence: Primarily in cavities in basalts;...crystals from near Bento Gon»calves, Rio Grande do Sul, Brazil. Name: From the Greek for worm, alluding |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...Crystal of multicolored tourmaline (84 x 26 mm), Lavra do Sapo, Ferruginha, Conselheiro Pena, Minas Gerais...(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) | | 1•[*3k : : . Ler:a1 l :i ge jop : :.r .Coro ri : do .voc Jrk, :jkc B_h1 : :a pek •.ar. d ozl . L:i[G... 1 90 2tcf te 2btí}eiíung. §• ios . 3eoiit . Zeolite .r. aft als i erffcinerr in ben 2fbbanb(ungen...DACHIARDIET (G . d ' Achiardi, 1906) Fig . 1 3 (Zeolite mimetica ) (Ca,K 2 ,Na 2 ) 5Al .25H 2O 10 S` 38...district, Nova Scotia, Canada . Ri o das Antas, Rio Grande do Sul, Brazili . Poona, India . N John H . Heuland...Farier ; IJsland ; Groenland . Bij Rio das Antas, Rio Grande do Sul , Brazilië . Sunnyside, Cochise County |  | | | | mistakenly called Piranha agates) from Rio Grande do Sul, Brazil, are such an agate. Fairburn agates derive...follows the ‘tube’, yet another reason why the bands do not often follow the contours of the vesicle. The...layers are composed of minerals of the chlorite group. The outer surface of celadonite is smooth, the...other minerals such as calcite and members of the zeolite family. Subsequently, agate banding, shape, form...around some bands, colour by itself has nothing to do with the growth of an agate, but is a by-product |  | | Book | | mistakenly called Piranha agates) from Rio Grande do Su l, Brazil, are such an agate. Fairburn agates derive...follows the 'tube', yet another reason why the bands do not often follow the contours of the vesicle. The...layers are composed of minerals of the chlorite group. The outer surface of celadonite is smooth, the...around some bands, colour by itself has nothing to do with t he growth of an agate, but is a by-product...around a needle-like crystal. often of a type of zeolite that may well have formed within the cavity before |  | | Book | | crystals up to 50 mm(approx. 2in) also occur there, as do calcite crystalwith copper inclusions. Superb supergene...Most historical diamonds from India (Golconda), Brazil (Diamantina, Minas Gerais), Congo. Angola and I...intensive oxidation/reduction reactions of pyrite in Rio Tinto, Spain and in Kostajnik, Serbia. Application:...Kazakhstan. Massive aggregates are important Cu ore in Rio Tinto, Spain; Bor, Serbia; Bisbee, Arizona, USA and...Canada; Bingham, Utal1; Bisbee, Arizona, USA and Rio Tinto, Spain. Application: important Cu ore. Coloradoite |  | | Book | | crystals up to 50 mm(approx. 2in) also occur there, as do calcite crystalwith copper inclusions. Superb supergene...Most historical diamonds from India (Golconda). Brazil (Diamantina, Minas Gerais), Congo. Angola and Namibia...intensive oxidation/reduction reactions of pyritc in Rio Tinto. Spain and in Kostajnik. Serbia. Application:...Kazakhstan. Massive aggregates are important Cu ore in Rio Tinto, Spain; Bor. Serbia; Bisbee, Arizona. USA and...Canada; Bingham, Utah; Bisbee, Arizona, USA and Rio Tinto, Spain. Application: important Cu ore. , +- |  | | Catalog/List | | other lots I will need to use a separate bid sheet. Do you want to receive an email, text message, or fax...cut bid). Any podium, fax, phone or mail bids that do not conform to a full or half increment will be rounded...specimen collecting policy on the part of Kennecott and Rio Tinto Mining Companies during the period of operation...operation from 1993 - 1997. This iridescent crystal group is typical of the high quality Chalcocites that...$400-$600 53003 TOURMALINE Himalaya Mine, Mesa Grande, San Diego County, California, USA San Diego County |  | | Book | | as the Paraná Continental Flood Basalt Province, Brazil or the Deccan Trap Province, India strong indications...are polysynthetically twinned according to the Brazil-twin law, with the c-axis slightly twisted around...of chalcedony and the high frequency of defects, Brazil twinning and twisting in the chalcedony “fibers”...quartz, with a periodic twinning according to the Brazil-twin law at the unit-cell scale [86]. Although...However, Flörke [95] first suggested that most agates do not contain any opal-A. It can be assumed that most |  | | Journal (article/letter/editorial) | | as the Paraná Continental Flood Basalt Province, Brazil or the Deccan Trap Province, India strong indications...are polysynthetically twinned according to the Brazil-twin law, with the c-axis slightly twisted around...of chalcedony and the high frequency of defects, Brazil twinning and twisting in the chalcedony “fibers”...periodic twinningtwinning accordingaccording to the Brazil-twin stacking oflayers layers right‐ left‐handed...occurrence pure moganite is rare, the intergrowth of Brazil‐twin law at the scale [86]. the of pure moganite |  | | Catalog/List | | cut bid). Any podium, fax, phone, or mail bids that do not conform to a full or half increment will be rounded...purpose of identifying the items for those Bidders who do not have the opportunity to view the lots prior to...contacted by Heritage in the future. In conformity with “do-not-call” regulations promulgated by the Federal...browse for the lot you are interested in. You can do this from the home page, from the Auctions home page...zone differences, etc. We will make sure that you do not bid against yourself. Mail Bidding Instructions |  | | Book | | some of the reasons why minerals look the way they do and are found in some places and not others. Such...the extrusive igneous rocks. The intrusive rocks do not reach the surface but on rapid cooling may cut...rocks contain large crystals, often of the feldspar group and are known as porphyries. The individual crystals...their crystal structure, and chemical relationships do illustrate the way in which particular species were...other books that a serious attempt to describe and group minerals could be seen to be in progress. His De |  | | Book (edition) | | will be called minerals. Natural substances which do not fit any of the mentioned criteria are sometimes...3-fold, 4-fold 6-fold. A, r L Some crystals do not have axes of symmetry (excluding Ai, of course)...line, keeping track of their first position, and do this an infinite number of times. This is a plane...polyhedra which result are strongly bound together but do not fill the space perfectly because tangency between... Example of pseudomorphism: limonite after pyrite (Brazil) transformations are possible in the laboratory |  | | Book | | adjusting these factors in a manner no color camera can do to bring before the eye the truest representations...chemical compounds, or artificiaJly grown crystals do not count as minerals. The reader will have noticed...There are even some minerals, such as opal, which do not have a strictly regular internal structure. ...accounts of minerals date from that period. These do not merely tell us about the occurrence and mining...one positively and one negatively charged ion or group of ions: a positive cation (+),and a negative anion |  | | Catalog/List | | AMETHYST CATHEDRAL – MATCHED PAIR Rio Grande do Sul, South Region, Brazil This organically shaped Amethyst...QUARTZ ON QUARTZ Minas Gerais, Southeast Region, Brazil Deep pink Rose Quartz crystals are situated on...CITRINE CATHEDRAL – MATCHED PAIR Rio Grande do Sul, South Region, Brazil Gracefully curving upward, the...miles east of Fredrico Westphalen, Rio Grande do Sul, South Region, Brazil The sparkling interior of this...GYPSUM CRYSTALS Var. Selenite Rio Grande do Sul, South Region, Brazil Extremely large, water clear Selenite |  | | 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...mixing or grinding is carried out.) FILE AGATE Group: Silicates Crystal system: Trigonal Chemicalformula:...is a form, alabaster is a member of the sulphate group of minerals and gemstones. Each molecule is composed |  | | Book (edition) | | commonly have several variants, such as Great Smoky Group, Great Smoky Conglomerate, Great Smoky Formation...If used on level 1, Term set options are: rock group (carbonate rocks, chemi¬ cally precipitated rocks...was adopted. Broader Term (BT, BX, BA, BZ) - A group of which the Term is a member or an area in which...Term (NT, NX, NA, NZ) - A specific mem¬ ber of a group which is represented by the Term or an area within...Term is a member. For example: peridot BA olivine group BA nesosilicates BA orthosilicates BA silicates |  | | Book (edition) | | deals with the descriptive mineralogy of a selected group of species representing those most likely to be...specimens are never easy to obtain even for the well-to-do, for there is no guarantee that only the best will...educated collector and connoisseur. In the latter group may be, for example, alexandrite twins from the...scientific world by storm. But extremely few ever do so, and they must»be content to add a bit here and...looks up the data on it, but it is assumed he will do this in any case. It is his influ- ence on others | | | Book (edition) | | vvith the descriptive mineralogy of a selected group of species representing those most likely to be...specimens are never easy to obtain even for the well-to-do, for there is no guarantee that only the best vvill...educated collector and connoisseur. In the latter group may be, for example, alexandrite twins from the...scientific vvorld by storm. But extremely few ever do so, and they must be content to add a bit here and...looks up the data on it, but it is assumed he ,-vill do this in any case. It is his influence on others that |  | | Book (edition) | | a. Geographic Coordinates peridot BA olivine group nesosilicates orthosilicates silicates BT minerals...ranges have coordinates in the Thesaurus, while others do not. Some older geographic terms lack coordinates...Thesaurus, are added to citations on areas which do not correspond exactly to any Thesaurus term, e.g...(BT-NT) relationship is that of a group to an individual in the group, e.g., BT minerals to NT silicates...of the specific minerals in the olivine group, the olivine group is one of several mineral groups in the |  | | Book | | describing some of its chemical properties. Within each group the minerals are listed accord¬ ing to CIM; and...treatment for a mineral species is to leave it alone. Do not attempt to clean any of the minerals listed here...been formed by the action of hot waters on silver sul¬ phides, or of metallic sulphides or arsenides on...celebrated Golconda mines being in the Madras area; in Brazil, from Diamantina, Minas Gerais; from South Africa...impossible to remove permanently. Algodonite Some workers do not consider this copper compound as a separate mineral |  | | Book | | Clopton, and the Authorffitle Index by myself. We do not intend to publish future indexes which are cumulative...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...muscovite from the Ze Pinto prospect, Minas Gerais, Brazil 21:405-408 --with J.P. Cassedanne: Crystallized...Gerais, Brazil 21:409-412 --with J. P. Cassedanne: The Jaguara~u pegmatite, Minas Gerais, Brazil 25:165-170 |  | | Book (edition) | | of Lheir outward appearance. So well did ,verner do his job that if the 1962 tran slation by Albert V...specimens oE the same species when called upon to do so. PHYSICAL MINERALOGY The developing science of...Penetration _Tivins ~laurolite, fiuorite , quartz (Brazil and Dauphine), orthoclase. Contact Twins Calclle...tried to write dovvn the number, ,ve ,vou ld put do,vn a lonely and, really, a rather foolish-looking...same as protons, contribute mass to the nucleus but do not influence the electrical charge. If we think |
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