 | | Book (volume) | | The Bowers Museum of Cultural Art Santa Ana, California + GEMSTONES OF EAST AFRICA by Peter C. Keller...Nevada; blue, cushion cut topaz (25.30 ct), Ramona, California; brownish yellow octagonal calcite (21.30 ct)...red-orange spessartine garnet (16.62 ct), Ramona, California; deep red cushion cut rhodochrosite (25.56 ct)...Kern County, California; octagonal step cut violetish pink kunzite (26.61 ct), Pala, California. NECKLACE...Vivid blue matched benitoite gems from San Benito County, California, consisting of 52 benitoites and 75 |  | | Journal (issue) | | ••• • •••••••• ••• ••• • •••• ••••• ••• 2 .50 CORUNDUM, Ceylon. Yellc,w translucent xi. 1 1/4" •. • .............................................402 CORUNDUM IN SOUTHERN AFRICA. By Robert UV, l\iletcalf ........................... ...... 417 AN OPAL OCCURRENCE IN ARIZONA. By Mrs. Bertha E. Schell ..........43 7 NOTES ON CURRENT' M IN ING AC'fIVITY IN CALIFORNIA ....................438 ROCKS AND MI NERALS ASSOCIATION..........._ _ _ ............ ... ... THE ROCKY MOUNTAIN FEDERATION OF MINERAL SOCIETIES CONVENTION, SALT |  | | Journal (issue) | | Collins The Lake Clear-Kuehl Lake area, Renfrew County, Ontario.........................................Endlichite and descloizite from the Chalk Mountain mine, Churchill County, Nevada .............................Nevada mine, Batopilas, Chihuahua, Mexico; and the San Fran cisco mine, Sonora, Mexico). We also have an...paper: 1 —Perthite occur rence, 2 —Craigmont corundum mine, 3 — Quadeville beryl-lyndochite pegmatite...environments, namely: granite pegmatites, nephelineand corundum-bearing gneisses, and calcite vein-dikes. A full |  | | Journal (article/letter/editorial) | | A New Source of Gem-Quality Cordierite and Corundum in the Laramie Range of Southeastern Wyoming Downloaded...cordierite and corundum (fig. 1). The cordierite is host ed by quartzofeldspathic gneiss; the corundum is found...1.47 carats) were faceted from cordierite and corundum from Palmer Canyon. Photo by Maha Tannous © GIA...of 0°F to a high of 105°F. The Palmer Canyon occurrence is situated at 5,760 feet above sea level, and...mineral occurrence is accessible by driving west from The cordierite and corundum occurrence is located |  | | | | temperatures and pressure, for example the building of a mountain chain that produces mica schist from previous...carbonate, borate, and phosphate groups are included. Corundum, spinel, cuprite, rutile, cassiterite, calcite...fluorite, 5 apatite, 6 feldspar, 7 quartz, 8 topaz, 9 corundum, 10 diamond. For field identification it is sufficient...interest that on an absolute scale of hardness corundum is actually two thousand times harder to scratch...cassiterite (dark reddish brown, black), p. 120 corundum (grey, blue), p. 112 gypsum (white), p. 124 |  | | Book | | & scoria 52 Pyrophyllite 205 217 220 62 Corundum &emery Rare-earth minerals 90 Salt Diamonds...abrasives, for example, have largely replaced corundum and its cohorts. A major movement in the opposite...vexatious matter of classification. Geological occurrence remains a major concern but it is not the one...industrial diamond, with a unit value such that its occurrence in minute amounts thousands of miles from markets...Ireland to the US Gulf Coast, gypsum from Mexico to California, and feldspar from Finland to Malaysia. More |  | | Report (volume) | | https://archive.org/details/corundumperidoti01prat CORUNDUM AND THE PERIDOTITES OF WESTERN NORTH CAROLINA...SURVEY J. A. HOLMES, STATE GEOLOGIST VOLUME I CORUNDUM AND THE PERIDOTITES OF WESTERN NORTH CAROLINA...Carolina Geological Survey, a description of the Corundum and the Peridotite Deposits of Western North Carolina...I.—The corundum belt of North Carolina. General geology of the State. Geology of the corundum belt. Rocks...Rocks of the corundum belt. 21 21 23 26 Chapter II.—The peridotites and associated basic magnesian |  | | Journal (issue) | | Santa Santa Monica, Monica, California California 90404, 90404, USA USA Fig. Fig. I. 1. This assembled...FMSA FMSA John Sinkankas, San Diego, California California 9lO9, 9109, USA The literature of antiquity...Singhal.); Swedish like English. "Purple-coloured Mountain Crystal." Robals: rauwa, rawa; granater. "Small...palingu; hvit crystall "Transparent and colourless mountain Crystal". WhiteSaphires or WaterSaphires: willie...fragments and slivers of the most transparent white mountain Crystals". Taripo: "a milk-coloured quartz". Yellow |  | | Report (issue) | | . . . . . . . . . . . Virgin Lake celestite occurrence. . . . . . . . . . . . . . . . . . . . . . ..... . . . . . . . . . . . . .. Road-cut (Renfrew County Road 4) . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . . Gutz corundum occurrence. . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . Michaelis corundum occurrence. . . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . Jewellville corundum occurrence . . . . . . . . . . . . . . . . . . . . |  | | Journal (issue) | | in pink corundum from Greenland • Yogo sapphire update • Banded turquoise from Zhushan County, China •...Timothy Adams Dorrit Jacob Karl Schmetzer San Diego, California Canberra, Australia Petershausen, Germany...Johnson Guanghai Shi Washington, DC San Diego, California Beijing, China Alan T. Collins Stefanos...Carlsbad, California Sally Eaton-Magaña Lore Kiefert Elisabeth Strack Carlsbad, California Lucerne...Gilbertson Laura Otter Wuyi Wang Carlsbad, California Canberra, Australia New York, New York Gaston |  | | Book | | interest that on an absolute scale of hardness corundum is actually two thousand tin1es harder to scratch...cassiterite (dark reddish brown, black), p. 120 corundum (grey, blue), p. 112 diamond (colourless), p....Canada's newest mountains are part of the Cordilleran Mountain Region, which spans half the world - eighteen...British Columbia. Between the western and eastern mountain ranges, the central plateau affords some opportunity...yellow, brittle, with a greenish black streak. Occurrence It is found in placer deposits left by erosion |  | | Report (issue) | | barite occurrence Pakenham quarry Cedar Hill soapstone occurrence Galetta celestine occurrence Kingdon...Kingdon (Fitzroy, Galetta) mine Stanton lead occurrence Bell’s mine Calabogie area Bluff Point mine Calabogie...Renfrew–McArthurs Mills area Hunt mine Dacre iron occurrence Keyfortmore mine Radnor mine Sunset mine Spain...Mayo marble quarry Renfrew–Madawaska area Renfrew County Road 4 (Bruce Avenue) roadcut Highway 60 quarry...Kuehl Lake occurrence Quadeville East mine Quadeville West mine Gutz corundum occurrence Michaelis corundum |  | | Book | | such as quartz and feldspar, are widespread in occurrence. Others, such as platinum and diamond, are limited...grouped like the petals of a flower. Cleveland County, Oklahoma. Minerals Past and Present (75 percent)...is an important aid to understanding mineral occurrence. Examples of such groupings are copper, lead...nose-cone tips of guided missiles (see synthetic corundum). Quartz crystals are produced artificially to...Brazil. TOPAZ: APATITE: 550-pound crystal; Ottawa County, Quebec, Canada. Crystal Faces The regular, smooth |  | | Report (volume) | | geology and mining industry of Leadville, Lake County, Colorado, by S. F. Emmons, pp. 201-290, pis. xliv-xlv...reports of chiefs of divisions, pp. 1-101, pis. iv-x. Mount Taylor and the Zufii Plateau, by Capt. Clarence...pis. ii-xv. Quaternary history of Mono Valley, California, by Israel C. Russell, pp. 261-394, pis. xvi-xliv...pis. Ixii-lxiii. The geology of 'the island of Mount Desert, Maine, by Nathaniel Southgate Shaler, pp...eruptive rocks of Electric Peak and Sepulchre Mountain, Yellowstone National Park, by Joseph Paxson Iddings |  | | Report (issue) | | significance of the Platoro caldera, southeastern San Juan Mountains, Colo., by P. W. Lipman and T. A....and F. F. Wright___________ Rutile in the Harford County, Md., serpentinite belt, by Norman Herz and L....Valentine________________________ Phosphate occurrences in Nye County and adjacent areas, Nevada, by C. L. Rogers, F...Moore_____________________ On-land Mesozoic oceanic crust in California Coast Ranges, by E. H. Bailey, M. C. Blake, Jr...Hosterman, G. H. Wood, Jr., and M. J. Bergin_ A corundum occurrence in the eastern Alaska Range, Alaska, by D |  | | Report (issue) | | Mineralogy and Geology of the \Vkgnerite Occurrence co Santa Fe Mountain, Front Range, Cobrado GEOLOGICAL SURVEY...Geology of the Wignerite Occurance on Santa Fe Mountain, Front Range, Colorado By DOUGLAS M. SHERIDAN...Precambrian gneiss; this is the first recorded occurrence of wagnerite in the United States UNITED STATES...Mineralogy and geology of the wagnerite occurrence on Santa Fe Mountain, Front Range, Colorado. (Geological...Wagnerite Colorado Santa Fe Mountain. 2. Geology Colorado Santa Fe Mountain. I. Sheridan, Douglas M., 1921II |  | Owen, J. Victor, Hanley, Jacob J., Kerr, Mitchell J., Stimson, Matthew, Boucher, Brandon (2019) Geochemistry of pink corundum-bearing feldspathic gneiss, Frenchvale quarry, Cape Breton Island, Canada: metamorphism of albitised, Fe-poor clastic rocks. Mineralogical Magazine, 83 (2) 249-260 doi:10.1180/mgm.2018.165 | Journal (article/letter/editorial) | | Geochemistry of pink corundum-bearing feldspathic gneiss, Frenchvale Quarry, Cape Breton Island: metamorphism...once mined for dolomitic marble, contains pink corundum-bearing, quartzfree/-poor, feldspathic gneiss...with carbonate platformal rocks (now marble), corundum is confined to the feldspathic rocks. These feldspathic...Frenchvale corundum occurrence. Introduction Pink sapphire and ruby – Cr-bearing corundum - are known...The largest known single occurrence of these gemstones is a Type 1A occurrence: the Aappaluttoq deposit |  | Vysotskiy, S. V., Ignat’ev, A. V., Levitskii, V. I., Nechaev, V. P., Velivetskaya, T. A., Yakovenko, V. V. (2014) Geochemistry of stable oxygen and hydrogen isotopes in minerals and corundum-bearing rocks in northern Karelia as an indicator of their unusual genesis. Geochemistry International, 52 (9) 773-782 doi:10.1134/s0016702914090109 | Journal (article/letter/editorial) | | Stable Oxygen and Hydrogen Isotopes in Minerals and CorundumBearing Rocks in Northern Karelia as an Indicator...hydrogen isotopic composition of min erals in corundum occurrences and their host rocks in northern Karelia...Karelia. Minerals in the Khitoostrov and Var aka corundumbearing zones have extremely low δ18O (lower than...iso topic ratios of their protolith. Aluminous corundum plagioclasites were produced by highpressure...stable isotopes, oxygen, hydrogen, isotopic dating, corundum, Khitoostrov, Varatskoye, Karelia DOI: 10.1134/S0016702914090109 |  | | Report (issue) | | Denbigh Lily Robertson occurrence Cancrinite Hill occurrence Davis Hill occurrence Princess sodalite mine...River tactite zone occurrence Morrison quarry Davis quarry York River corundum occurrence Childs Mine Rankin...Maynooth Eagles Nest occurrence Baptiste Lake South occurrences McFall Lake diopside occurrence Warwickite occurrence...Thompson Mine Hickey Mine Selby Hill sunstone occurrence National Graphite Mine McKenzie Lake Mine Bancroft...Mine Woodcox occurrence Padwell Mine Eagle Lake quarry Crystal Lake fluoborite occurrence Crystal Lake |  | | Book | | Nikolaev, Jasper Berndt and Wolfgang Hofmeister Corundum Anorthosites-Kyshtymites from the South Urals...Fallick, Maria Tsortanidis and Andreas Lampridis Gem Corundum Deposits of Greece: Geology, Mineralogy and Genesis...Rubies and sapphires are coloured gem varieties of corundum and can be found in various places around the...Filina et al. [15] presented data on another occurrence of sapphires in the same region of the South...Voudouris et al. [16] give an overview of gem corundum deposits from Greece where they occur within clearly |  | | Book | | of the 'Irelawney Collection of the Los Angeles County Museum of Natural History. ♦ Figures vii Foreword...Appendix B. East African Gemstones in the Los Angeles County Museum of Natmal History Collections 138 Appendix...Tsavorite crystal. 77 Figure 3.12. Umba, Tanzania, corundum mine. 42 Figure 6.3. Campbell Bridges. 78 Figure...from the Trelawney Collection of the Los Angeles County Museum of Natural History. 113 Figure 9 .2. Occurrences...we cherish so much. Dr. John Sinkankas San Diego, California NOTES 1. Pliny. 1971. Natural History, |  | | Journal (article/letter/editorial) | | Magazine, June 1998, Vol. 62(3), pp. 325 332 A corundum-quartz assemblage in altered volcanic rocks, Bond...Rosny Park, Tasmania, Australia ABSTRACT Unusual corundum-bearing rocks occur in the Bond Range, northern...quartz porphyry. The assemblage exhibits quartz and corundum in mutual contact, a rare phenomenon, in association...hydrothermal, granitederived fluids. This corundum occurrence appears to be unrelated to the sapphires...sapphires in placer deposits in Tasmania. KEYWORDS" Corundum, quartz, diaspore, pyrophyllite, andalusite, Tasmania |  | Belley, Philippe M., Dzikowski, Tashia J., Fagan, Andrew, CempĂrek, Jan, Groat, Lee A., Mortensen, James K., Fayek, Mostafa, Giuliani, Gaston, Fallick, Anthony E., Gertzbein, Paul (2017) Origin Of Scapolite-Hosted Sapphire (Corundum) Near Kimmirut, Baffin Island, Nunavut, Canada. The Canadian Mineralogist, 55 (4) 669-699 doi:10.3749/canmin.1700018 | Journal (article/letter/editorial) | | 1700018 ORIGIN OF SCAPOLITE-HOSTED SAPPHIRE (CORUNDUM) NEAR KIMMIRUT, BAFFIN ISLAND, NUNAVUT, CANADA...Nunavut X0A 0H0, Canada ABSTRACT Gem-quality corundum (sapphire) occurs in scapolite-rich calc-silicate...A deposit of blue and colorless gem corundum (Beluga occurrence) is compared to a similar calc-silicate...lacking corundum but containing nepheline (Bowhead occurrence) and located 170 m to the SSW. Corundum formation...muscovite, corundum, and calcite. Late, lowtemperature zeolite mineralization is common in corundum-bearing |  | | Journal (article/letter/editorial) | | Rend.,Paris, 203, 94 (1936). NOTE ON THE OCCURRENCE OF CORUNDUM IN IDAHO* Vnnun C. Fnyrr.uND, JR., Llniaers...season of 1950 a corundum occurrence in sec. 22, T. 11 N., R. 4 E., of Valley County, 5 miles east of... S. Bureau of Mines, in August of 1950. This occurrence is unique among known occurrencesin Idaho in...the original source of the corundum found in Idaho gold placers. corundum has been reported from a number...other tributaries of the Payette River in Boise County (Shannon, 1926,p' I93); blue and green sapphires |  | | Journal (issue) | | Edgarbaileyite, the first known silicate of mercury, from California and Texas .....................................Origlieri Davis Hill near Bancroft, Ontario: an occurrence of large nepheline, biotite and albite-antiperthite...Schacht (who was bom Horace Greele} Schacht in the USA), President of the German Reichsbank. In du< course...found in low-grade metamorphic rocks produced by mountain building. The crucial characteristic of the environment... ORIGIN OF FADEN STRUCTURE During episodes of mountain building in which the dominant tec tonic forces |
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