 | | Book | | Sciences Harald G. Dill The HagendorfPleystein Province: the Center of Pegmatites in an Ensialic Orogen...com/series/7377 Harald G. Dill The Hagendorf-Pleystein Province: the Center of Pegmatites in an Ensialic Orogen...major constituents the three rock-forming minerals feldspar, quartz and mica, which in places develop mega-crystals...share of raw material extracted from pegmatites is feldspar, quartz and mica, and only a tiny fraction of...would like to do. Hagendorf has been mined for feldspar and the deposit is not yet exhausted as far as |  | | Journal (article/letter/editorial) | | . . . . . . . . . . . . . . . . . . . Platinum group elements (PGE) . . . . . . . . . . . . . . . . ...platinum-group-element deposits . . . . . . . . . . . . 6.3. Structure-related platinum-group-element...Sedimentary platinum-group-element deposits . . . . . . . . . . 6.5. Platinum-group-element supply and.... . . . . . . . . . . . . . . . . . . . . . . Feldspar . . . . . . . . . . . . . . . . . . . . . . ....and mineralogy of feldspar . . . . . . . . . . . . . . . . 39.2. Magmatic feldspar deposits . . . . | | | Journal (article/letter/editorial) | | . . . . . . . . . . . . . . . . . . . Platinum group elements (PGE) . . . . . . . . . . . . . . . . ...platinum-group-element deposits . . . . . . . . . . . . 6.3. Structure-related platinum-group-element...Sedimentary platinum-group-element deposits . . . . . . . . . . 6.5. Platinum-group-element supply and.... . . . . . . . . . . . . . . . . . . . . . . Feldspar . . . . . . . . . . . . . . . . . . . . . . ....and mineralogy of feldspar . . . . . . . . . . . . . . . . 39.2. Magmatic feldspar deposits . . . . |  | | Book | | 40Ar/39Ar Age of the Gem-Bearing BoqueiraĚo Granitic Pegmatite, Parelhas, Rio Grande do Norte, Brazil Reprinted...Gabriele Lanzafame Gem-Quality Tourmaline from LCT Pegmatite in Adamello Massif, Central Southern Alps, Italy:...Alluvial Sapphires from the Orosmayo Region, Jujuy Province, Northwest Argentina: Insights into Their Origin...Cenozoic Alkaline Basalts of the Ratanakiri Volcanic Province (Cambodia), Southeast AsiaâTrace Element Geochemistry...gem-bearing BoqueirĂŁo granitic pegmatite situated in the Borborema Pegmatitic Province (BPP) from Rio Grande do |  | | Report (issue) | | Minister J. E. Thomson, Director, Geological Branch Pegmatite Mineral Resources of Ontario By D. F. HEWITT.....l Pegmatite Mineral Production in Ontario (Table 1). . . . . .. . . . ... Number of Pegmatite Deposits.... . . . .. .l .l .l .2 .2 .3 .3 .5 .5 .5 .5 FELDSPAR .. ......................................................,...............9 Principal Types of Feldspar (Table 4). . . . . . . ... . . . ... . . . . ..... . . . . ... . . . .. . . . 9 Selling Crude Feldspar in Ontario. . . . . . . . . ... . . . . .. . |  | | Book | | Large and important cut stones 22 Large pink and red topaz 26 Large imperial topaz 27 3 Chemistry and...Synthesis of topaz 35 Crystal structure 36 The OH group and symmetry problems 4 Optical properties 44...70 Introduction to colour phenomena 70 Pink and red topaz 71 Localities 72 Genesis 72 Orange-brown, or...World sources 130 Introduction 130 Arab Republic of Egypt 132 Argentina 132 Australia 133 Austria 135 Brazil...well developed. Colour Allochromatic, in shades of red, pink, yellow, amber, brown, pale green, blue, violet |  | | Book | | are defined by chemical composition, structural group, and crystal system, with one or two references...such as amethyst for violet quartz and ruby for red corundum. Then there are series names, such as olivine...Si04) and fayalite (Fe 2 Si0 4 ) (see Olivine Group), group names, such as mica for all the minerals with...pyrite) and also to a group of minerals having the same structure pyrite group). kind of mineralogic...names of series or groups (e.g., plagioclase or feldspar) are set in boldface italic letters. Varietal |  | | Journal (issue) | | Surface structure of the shell Haliotis rufescens (red abalone) can be found along the west coast of North...20 cm long. The outer layer of its shell appears red to brown and consists of prismatic calcite. The inner...zoning often seen in brown, brownpink, and pink to red diamonds. Although some scientific uncertainty still...same planar zones where the purple, brown, pink or red coloration is seen (Kane, 1987; Fritsch, 1998). Surface...with increasing strength in the spectra of pink to red diamonds (Shigley and Fritsch, 1993; also see Figure |  | | Journal (issue) | | Cultured pearl mystery ⢠Treated-color âgoldenâ South Sea cultured pearl ⢠Quartz crystal with âlizardâ inclusion...it is preferable to refer to them as black South Sea cultured pearls. Avi Raz A&Z Pearls Los Angeles ...gem materials in the 1930s, â40s, and â50s. This group includes G. F. Herbert Smith, Robert Shipley, Robert...identification and quality grading. Prominent in this small group is G. Robert Crowningshield (figure 1), who joined...to G. ROBERT CROWNINGSHIELD pass long hours at sea, he read books on gemstones. He began purchasing |  | | Book | | previously. Amazonite is a variety of potassium feldspar, a group of minerals extremely widespread in the Earthâs...considered one of the first mineralogical criteria for pegmatite prospecting and evaluation. The formulation of...genetic problem might have remained a side issue of pegmatite genesis were it not for the mid-twentieth-century...assemblage of lithophilous rare elements. As in pegmatite deposits, granite amazonitization to scale turned...The aforementioned characteristics of amazonitic feldspar allow it to be classified as highly promising |  | | Book | | addition to plant and animal specimen. SINTEF GROUP â is the largest independent research organization...petrographical variations among the glauconite deposits from Egypt Baioumy, HM, Boulis, SN, and Hassan, MS 39 5 ...Haberlah, D 26 The discovery of a new metallogenic province in Sardinia (Italy): AuâAg mineralisations of...Quantitative mineral characterization of granitic pegmatite using Topas Rietveld XRD refinement Hestnes, KH...quartz and their regional distribution in two pegmatite fields of Southern Norway MĂźller, A, and Ihlen |  | | Book | | 2013). MALAWI Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series...massive calcite. or, rarely, still attached to the feldspar/mica walls of the dike (www.davidkjoyceminerals...which are coated by rutile or hematite are yellow or red and earthy; they are equant to short-prismatic, and...Administered Tribal Areas and North West Frontier Province. Ilmenite crystal clusters to 12 cm across have...Mountain, Warsak district, North West Frontier Province. Surface diggings worked by local people on Zagi |  | | Report (issue) | | are liquids at room temperature element names in red are gases at room temperature element names in black...Survey has produced this volume to describe a select group of mineral commodities currently critical to our...antimony in China; niobium in Brazil; and platinum-group elements in South Africa and Russia), thus increasing...same commodities. Rare-earth elements and platinum-group elements particularly are broadly viewed as critical...lithium (Li), manganese (Mn), niobium (Nb), platinum-group elements (PGE), rare-earth elements (REE), rhenium |  | | Book (edition) | | Topaz, Opal. II 68 IMPORT ANT GEMSTONES The Feldspar Group, Spodumene, Tourmaline, Sodalite, Olivine (Peridot)...Rhodonite, ldocrase (V esuvianite), The Garnet Group. 199 246 III QUARTZ FAMILY GEMSTONES IV RARE AND...Frontispiece. Drawing of tourmaline and morganite group 1. Crater of Diamonds, Arkansas 2. Star of Arkansas...W. pegmatite mine, Pala, California 17. Mack mine, Rincon, California 18. Beryl-bearing pegmatite, Baja...Ramona, California 21. Gem-bearing pocket in pegmatite, Baja California 22. Drawing of topaz crystal |  | | Book (edition) | | Minerals that are listed as belonging to the same group are similarly closely comparable in composition...Aulunite grou ⥠Abhurite, Sn3 O(OH) 2 Cl 2 , trig., Red Sea covc, known as Sharm Abhur, about 30 km north of...Mountains,Russia,DANS 142, 181-184(sir.) Aescl1yni1e group 0 Aeschynite-(Nd),(Nd,Ce,Ca,Th)(Ti,Nb)i(O.OH)...Urstad,HitteroIsland,Norway, 61. 178 Aeschy11i1e group D Afghanite,[(Na,K)22Ca10][Si24Al14O9<,](SO.)...2105, EJM9, 21-30 (sir.) Ca11cri11ile-Sodali1e group D Afwillite,Ca,(SiO3OH)1¡2H1O, mon.. compareBultfonteinite |  | | Journal (issue) | | Potentate mine sapphire update ⢠âRainbow latticeâ feldspar ⢠Responsibly sourced gemstones ⢠The Chinese...add GST. Discounts are available for renewals, group subscriptions, GIA alumni, and current GIA students...the 2017 news of sapphires from northern Tigray Province, prompted a 2018 GIA field expedition. Led by...by field gemologist Wim Vertriest, the group documented mining and processing, measured social impact,...various species, and many others of the tourmaline group, are lacking. Laser ablationâinductively coupled |  | | Book | | Crystal of brazilianite (25 mm), muscovite and feldspar, Lin6polis, Divino das Laranjeiras, Minas Gerais...The magical all ure of the cuclase 407 The exotic group of the garnets 408 Garnets of the pyralspite series...bamb11rro of the Lavra do Jonas 577 The Pegmatitic Province of Paraiba, Rio Grande do Norte and Ceara 586...diversified mica group 602 The clay mineral groufa 604 The tectosilicate subc ass 605 The feldspar group 608 The...Helvite 611 Scapolite 612 The surprising zeolite group 619 The large quartz family 624 Rock crystal 630 |  | 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) | | Species containing more than one anion or anion group may be assigned to a separate class or may be assigned...specifies the atomic (cation to anion, or to anion group) ratio for the mineral. This and the remaining numbers...appropriate Dana number. When recognized, membership in a group is noted. Occasionally, the phrase âan inadequately...internally contradictory. 5A. Groups The term group refers to an aggregate or multiple (usually three...identical or closely similar structure and chemistry. A group may be named when there are several end members |
|
