 | | Journal (article/letter/editorial) | | hyperspectral PL maps. Zircon from the Ratnapura district (Sri Lanka, ~520 Ma), was used as reference material...bands is discussed on two examples from Mt. Malosa district, Malawi. A mean weighted U-Pb isotope age of 111...relatively large, gem-quality zircon samples from gem-gravels in Ratnapura, Sri Lanka that have high chemical...well-studied reference material from the Ratnapura district (Sri Lanka). The basic principle and underlying...Samples Previous studies on zircon samples from Sri Lanka have investigated the correlation between the |  | | Book | | Dimensions in the captions refer to the entire gem or mineral; however, in some cases only a portion...A CHANGING PLANET 11 Vanadinite, San Carlos district, Chihuahua, Mexico * 8 x 4 x 2 cm Mineral Species...can be as valuable as the richly colored stones. Gem cutters bring out the inner beauty of gems by creating...trick with light. Facets allow light to enter the gem; once inside, the light bounces off its other angled...Africa and Canada ÂŤ 2.00 ct and 3.06 ct leaves the gem, similar to what happens when you pass light through |  | | Book | | and Zirconolite Inclusions in Marble-Hosted Gem-Quality Ruby and SpinelfromMogok,Myanmar Reprinted...3390/min10020195 . . . . . . . . . . . . . . . . . . 107 Mandy Y. Krebs, Matthew F. Hardman, David G. Pearson, Yan...Secretary and Chairman for the IMA Commission on Gem Materials. In his research he has authored and co-authored...valuable gem minerals within the annals of natural gemstone studies, namely ruby, the red-colored gem variety...V.; Wang, K.; Tarantola, A.; Zaw, K.; Meffre, S. Gem corundum deposits of Greece: Geology, Mineralogy |  | | Book (edition) | | 1 2 The Geological Sources of Gems Crystalline Gem Materials 3 40 Part II 3 4 5 6 7 8 9 10 11 12 13...The Biological Gem Materials The Fashioning of Gemstones Value-Enhanced Gemstones and Gem Materials 292...library for virtually all sources. Derivations of gem and mineral names are not given; they can be found...not now considered valid or current. While many gem collectors collect mineral specimens too, the text...text for the 1994 edition. In this new edition, the gem testing section has been omitted; this information |  | | Journal (article/letter/editorial) | | zirconium Harald G. Dill Institute of Geosciences, Gem-Materials Research and Economic Geology, Johanne...present study, mineralogy and geology act as x- and y-coordinates of a classiďŹcation chart of mineral resources...encompassing minerals and elements are plotted along the y-axis, forming the lines of the spreadsheet. These...6Ni0.4O6.4(OH)9.7Cl1.3 MnS NaAlSi3O8 BeAl2O4 (Ce,Ca,Y)2(Al,Fe)3(SiO4)3(OH) Ag0.99Sb0.01 BaCa(CO3)2 PbTe...Fe7(Si8O22)(OH)2 XY2Z5(Si, Al, Ti)8O22(OH, F)2 X = K, Na, Y = Fe Ca, Mg, Mn, Zn, Z = Fe, Mn, Al, Ti NaAl(Si2O6)¡(H2O) | | | Journal (article/letter/editorial) | | zirconium Harald G. Dill Institute of Geosciences, Gem-Materials Research and Economic Geology, Johanne...present study, mineralogy and geology act as x- and y-coordinates of a classiďŹcation chart of mineral resources...encompassing minerals and elements are plotted along the y-axis, forming the lines of the spreadsheet. These...6Ni0.4O6.4(OH)9.7Cl1.3 MnS NaAlSi3O8 BeAl2O4 (Ce,Ca,Y)2(Al,Fe)3(SiO4)3(OH) Ag0.99Sb0.01 BaCa(CO3)2 PbTe...Fe7(Si8O22)(OH)2 XY2Z5(Si, Al, Ti)8O22(OH, F)2 X = K, Na, Y = Fe Ca, Mg, Mn, Zn, Z = Fe, Mn, Al, Ti NaAl(Si2O6)¡(H2O) |  | | Book | | Bermanec Formation Conditions and 40Ar/39Ar Age of the Gem-Bearing BoqueiraĚo Granitic Pegmatite, Parelhas,...Antonio Langone, Ilaria Adamo and Gabriele Lanzafame Gem-Quality Tourmaline from LCT Pegmatite in Adamello...Fallick, Maria Tsortanidis and Andreas Lampridis Gem Corundum Deposits of Greece: Geology, Mineralogy...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 |  | | Book | | The best lazurite crystals come from Badakhshan Province in Afghanistan, which is also the source of the...different aspects of the rock or mineral, including gem cuts, different habits, and colour variations. COMPOSITION...however, and some of the most richly coloured are gem minerals that are beautiful, durable, and rare. ...Sc Se Si Sm Sn Sr Ta Tb Tc Te Th Ti Tl Tm U V W Xe Y Yb Zn Zr Polonium Praseodymium Platinum Plutonium...BANDED IRONSTONE LIMESTONE S E D I M E N TA R Y R O C K S 21 Conglomerate This common rock type |  | | Book (edition) | | Strunz since 1941 (Strunz and Nickel 2001): ⢠Subsidim-y anions (OH,F,O) are positioned before the complex...expressed in abbreviations: Rep. (republic), prov. (province), co. (county), munic. (municipio), pref. (prefecture)...dept. (departement), dept. (departamento), dist. (district). Less common terms are not abbreviated, e.g....the revolution in 1997. Its mineral rich Katanga province was renamed Shaba by Mobutu, and is now the Katanga...Katanga administrative region again. The former Kivu province is now divided to three regions: INTRODUCTION |  | | Book | | '.:. :,.¡ ~'. ', â˘â˘ 1, â˘,¡ \:_)\_?. '.:,y::_.;:' ⢠.-.,¡¡: ..,;'.-¡.:¡.;:/f/t'l.._._._,, '¡¡¡â˘â˘::::â˘â˘...last, at www.MineralogicalRecord.com I IIMORIITE-(Y) EUROPE FRANCE Trimouns quarry, Luzenac, Ariege....extremely rare yttrium silicate-carbonate iimoriite-(Y) occurs at Trimouns as colorless, pink and pale brown...MALAWI Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series of incompletely...Administered Tribal Areas and North West Frontier Province. Ilmenite crystal clusters to 12 cm across have |  | 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) | | example, tritomite-(Ce) and tritomite-(Y) are end members [Ce+Y] in the tritomite series [AM 51:152(1966)]...nal order detectable by diffract at least a implies y generall here use fied exhibits external faces, but...where h, k and] are positive or negative, unequal y elesymmetr all by upon acted are faces al the general...spacing, and subscripted by the relative intensit y from 10 down to 1. The pattern is preceded by the...orientation is given. The correspondence between X, Y and Z with crystallographic axes a, b, and c for orthorhombic |  | | Journal (issue) | | of western U.S. locations, including the Little Gem amethyst scepter mine in Montana, the Fluorita Dulcita...Rhodochrosite on Manganite N'Chwaning Mine, Northern Cape Province, South Africa. 8.7 cm In 1978 a historic discovery...TUCSON T HE T U CSON FINE M INER A L G A L L ER Y 465 W ST MARYS ROAD, TUCSON 85701 WWW.TUCSONFINEMINERALGALLERY...STO LOW I T Z 427 Main S t re e t | Be a co n N Y, 1 2 50 8 802-272-296 8 | g r e e n m o u n t a i...emeralds. It has long been a commonplace in the gem trade that the worldâs 2709 E. Exeter Street,Tucson |  | | Book (edition) | | - MINERALOGY Other Books by John Sinkankas: GEM CUT TINGâA GEMSTONES PROSPECTING OF Lapidaryâs...Measuring refractive indices - Immersion method - Gem refractometer - Polishing test specimens - Luster...selections from it may be seen in the Mineral and Gem Hall. Other famous names from the same era are William...corundum, ilmenite, and others, are often found in gravels and sands, not much worse off except for the wear...bubble ââââ~ star sapphire liquid star on cut gem salt crystal TOURMALINE ââ â inclusions aligned | | | Book (edition) | | MINERALOGY FOR AMATEURS Other Books by John Sinkankas GEM CUTTING-A Lapidary's Manual, 2nd Ed. GEMSTONES OF...Measuring refractive indices ⢠Immersion method ⢠Gem refractometer ⢠Polishing test specimens ⢠Luster...selections from it may be seen in the Mineral and Gem Hall. Other famous names from the same era are William...(FLU OR ITE) (-) ~ (- ) 0 . ¡1 I Co Ic, um read , y ~se s ~- _ . i ng positive ion wi th p lus I ...corundum, ilmenite, and others, are often found in gravels and sands, not much "\-Vorse off except for the |  | | Book (edition) | | 1nineral collectors and are therefore 1nost like] y to be found in the slocks of 1nineral suppliers. Further...Measuring refractive indices ¡ In1mersion m ethod ¡ Gem refracton1eter ¡ Polishing test specin1ens ⢠Luster...likely that gold and copper, both known to occur widel y in native form, were the first metals encountered...ical treatise Bibliotheca Historica, in ,vhich man y observations ,vere made on mining and m ineralogical... Carozzi is consulted, it will be seen that 1nan y of the ter1ns \-Ve use today ,,vere coined by Werner |  | | Book (edition) | | referred to. Chemical Classification The ava ilabilit y of several excellent mineral iden tifica tion computer...ineďż˝c 5J 93&'.l 39 Zr 40 Nb 41 Mo 42 Tc y ¡n,,....-n 88ďż˝9 5d 22 VA 57 La l...lnt/"IJt\u(TI...Sn 51 l(r,-pâ˘O" BJ !,/./ Sb Te 52 53 I 126'Y.).!.ďż˝ Xe ,..,,,. 49 lt'(h,.-, 1 1.: e2 81 TI...L.-.,o 201 2 6::.-,.;n 2CS <)?OJ 68 Tm 84 ďż˝<Y' ----t 2'8 ""'"" 85 At ďż˝-;,,aâ˘re llO I l l 3i)...Npp .. .:.,- .. ::;: ' Pu Am Gd ⢠r ⢠¡: (,,Y 96 Cm C 65 /'( .â˘:; :â˘:- : : 97 Bk Bk 66 |  | | Book | | composition and structure with naturally occurring gem minerals. These manmade gems, however, are referred...important emerald locality is limited to a small district near Muzo in Colombia, South America. Minerals...demand. REFERENCES 1. S. H. Ball, "Historic Notes on Gem Mining," Economic Geowgy, Vol. 26, 1931, pp. 681-738...RHODONITE Forms: pinacoids. 0.62 C 0.40 Forms: (c, b, y) pinacoids; (m) prism. Forms: (c) pinacoid; (rz ...transitions. (a) disordered solid solution of X and Y atoms where Y atoms (black) are distributed at random on |  | Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York. | Book (volume) | | 100. Found at several mines in the Huantajaya district, calcite, embolite, cerargyrite, bromyrite, iodyrite... Halides 10 VILLIAUMITE [NaF]. 9.1.1.3 C r y s t. Forms : Lacroix {C.R., 146, 213, 1908). Isometric;...as at Caracoles in Antofagasta, the Huantajaya district in Tarapaca, and especially Chanarcillo in Atacama;...Obtained in notable amounts in the Broken Hill district. New South Wales (bromian pt.). In the United...Tombstone, Cochise County, Arizona; in the Rand district and in the Calico and Barstow mines, San Bernardino |
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