 | | Journal (issue) | | March 2019 Fluorescent Opal From the Velvet District, Pershing Co., Nevada Bob Werner werner@lcturbonet...werner@lcturbonet.com The diatomite mines of the Velvet District haven't received much attention over the years...years, while diatomite is a "sedimentary rock" of course, and technically not a mineral. Opal, however, is...was first reported in the District in 1923 (Vanderburg, 1936) on the west side ofTrinity Pass in the...(EPM) who developed four open-pit mines in the District (Johnson, 1977). The diatomite consists of the |  | | Book | | vugs of crystalline talc. Easily the best extant crystal, a doubly terminated floater found in a talc vug...a few such specimens have been found after 1960 (see the Amity-Edenville entry for Edenite and Spine!)...Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series of incompletely...to 2 cm which are pseudomorphs after bastnasite--see photo in Guastoni, Pezzotta and Zorzi (2008). ILMENITE...Shelley Lambert extracted excellent loose ilmenite crystal clusters from a calcite vein-dike digging site |  | | Journal (issue) | | Weisseck, Austria. Collected by Reinhold Bacher; Reinhold Bacher photo. Fluorapatite, 3.3-cm crystal, from...own favorite experiences is gazing raptly into a crystal pocket just after it has been opened, and all the...classic locality for spectacularly large apophyllite crystal clusters, which still rank as some of the largest...for allowing a ādoorwayā to be opened to the left (west) of this byssolite region. Across the top of this...cleaned off the thaumasite to expose the entire crystal. It is free of damage thanks to the protective |  | | Book | | literature, Mr Readās task was far from simple and I am most grateful for his discriminating selection of...beryl in collections Iran 44 Turkey 46 USSR 48 Austria 50 Germany 52 Italy 53 France 54 Spain 55 Portugal...Modern emerald and beryl jewellery Chapter 4 67 Crystal structures and chemical composition The beryl structure...184 Antarctica 184 Argentina 184 Australia 185 Austria 187 179 Brazil 189 Colombia 195 India 197 Malagasy...Malagasy Republic Mexico 199 Pakistan (West) 198 200 Republic of South Africa Namibia 202 Sri Lanka |  | | Book | | literature, Mr Read's task was far from simple and I am most grateful for his discriminating selection of...beryl in collections 44 Iran 44 Turkey 46 USSR 48 Austria 50 Germany 52 Italy 53 France 54 Spain 55 Portugal...Modem emerald and beryl jewellery Chapter 4 67 Crystal structures and chemical composition The beryl structure...185 Austria 187 Brazil 189 Colombia 195 India 197 Malagasy Republic 198 Mexico 199 Pakistan (West) 200...5 2.66 7.5 2.68 7.5 2.80 7.5 2.85 7.5 Crystal system Optical clarity Hexagonal Transparent |  | | Journal (issue) | | Bariand Paris, France Werner Lieber Heidelberg, West Germany Olaf Medenbach Bochum, Germany Eric Offermann...F. J. Parker Tveitite from the Barringer Hill District, Texas..................................387 byW...388 by H. Barwood and B. Hajek Zircons of Summit Rock, Oregon...........................................Out-of-print copies are being handled by Si & Ann Frazier (see their ad). contributed manuscripts Contributed articles...approval of the editor. suggestions for authors See vol.9, no.3, p. 135, or write to the editor for a |  | | Journal (issue) | | is the most notable stock they have seen in the West. Many of the supporters of Rocke and Mlurala ILG\...Number; the February, 1937, issue was a Special Rock Crystal Number. The next special number may be devoted...formulas. Pyrrhotite is the commonest mineral in the district but pentlandite and chalcopyrite are also very...King Maximilian, and one for Duke Sigismund of Austria. The remainder of the meteorite, regarded as a...mineral 37. Biotite species than any other type of rock. 38. Bismuth The minerals listed have been found |  | | Journal (issue) | | tioned previous works should include data such as crystal size, habit, color, associations, a precise location...usually only do this once a year, so have a look and see what you need. Or pick out some special issues to... LOCATION Trumbull Peak is located on the western slope of the Sierra Nevada Range in NEV4 Sec. 9, T3S,...MeridĀ ian, about 67 km northeast of Merced and 8 km west of El Portal, the gateway to the Yosemite National...area is located about 200 meters down the steep slope to the northwest. There are no physical landmarks |  | | Journal (issue) | | practical conservation of mineral localities and unusual rock formations. Ever since its foundation in 1928, the..................... COLLECTOR'S KINKS. SPLITTING ROCK WITH THE AID OF HEAT. By James A . Taylor ........coloring of many of the specimens, their very fine crystal forms, nor even their generous size~ and prices-it...J., ken. To avoid .disturbance to traffic 1t and West 39th Sc., New York City. Two was necessary to carry...Hudson Tunnel, tures bring the approach onto the west was .finance:d, designed and built by the side of |  | | Journal (volume) | | Geologist C A. Logan, District Mining Engineer C. McK. Laizure, District W. Burling Tucker, Reid...Reid J. Frank Sanborn, District Mining Engineer District Engineer Mining Engineer Mineral Technologist...Ore-Buyers' Inspector Henry H. Symons, J. C. District Sampson, Assistant Ohas. V. Averill, John ...Reports of District Milling' Engineers Redding Field District Sacramento Field District San Francisco...Francisco Field District Los Angeles Field District Mineral Development and Mining Activity in Southern Ā« California |  | | Journal (issue) | | Bowel) Spedal Rock Cryatal Number In this issue we are presenting a series of articles on rock crvstal, one...display included groups of magnificent crystals and crystal aggregates of azurite, malachite pesudo after azurite...FEBRUARY .. 1937 .. CONTENTS FOR FEBRUARY, 1937 Rock Crystals-Some Facts and Uses. By Peter Zodac................................ 38 Inclusions in Rock Crystal. By Peter Zodac...............................By Frank Garaventa.................... 53 Digging Rock Crystals near Napanoch, N. Y. By Peter Zodac... |  | | Book (volume) | | Division of Litton Educational Publishing, Inc. 450 West 33rd Street, New York, NY 10001 Van Nostrand Reinhold...finishing with places in Central America and the West Indies. If known, information on features of mineralogy...commerce. Coarser gemstones, or those which are rock-like in character or abundance, are treated in still...Gemstones, Crystals, The Geometry of Crystals, Crystal Growth, Cleavage, Specific Gravity, Light upon...645 668 List of Illustrations . Six crystal systems . A crystal lattice . Refraction and reflection of |  | | Book | | Published by Van Nostrand Reinhold Company Inc. L35 West 50th Street, New York, N.Y. 10020 Van Nostrand Reinhold...detailed review of the .Minerals of California series, see I. Campbell, 1966, pp. 13-19.) For over 100 years...project, and who also prepared the majority of the crystal drawings for publication. H. Earl Pemberton Lake...character of the state's eleven geomorphic provinces (See Map 1-1). From the lake-bed deposits of the Basin...mol Molecular. norite A coarse-grained plutonic rock containing labradorite as a chief component and | | | Book | | ^ 'ā P r . . . I West Orange SOUTH SAN FRANCISCO PUBLIC LIBRARY 9048 00992838 7 257989 R q549...Published by Van Nostrand Reinhold Company Inc. 135 West 50th Street, New York, N.Y. 10020 Van Nostrand...detailed review of th e Minerals of California series, see I. Campbell, 1966, pp. 13-19.) For over 100 years...support for also prepared the majority of the crystal drawings for publication. H. Earl Pemberton ...of the diverse character of the stateās eleven (See Map 1-1). mineral species, plus 5 species found |  | | Report (issue) | | description includes the chemical composition, crystal form and habit if distinctive, cleavage, hardness...magma, or molten rock material. Usually this results in the crystallization of the rock-forming minerals...precipitation of dissolved material, as in the case of rock salt or gypsum. More commonly they are made by the...the accumulation of actual particles of rock material washed down from the land surface and spread out...the action of powerful earth any earlier-formed rock mass, so that notable changes in forces on character |  | | Report (issue) | | from references to the geographic term ''Mining District," especially in the pre-1920 literature. Widespread...new silicate minerals ( Agrell, Brown, and McKie Am. Mineral. 50, : p. 278). Hand in hand with the...imagine what Professor Blake might think if he could see the trends in commercial minerals that have developed...such-and-such a formation, or in this-or-that kind of rock, or adjoining a certain kind of contact, is a favorable...are making California 's mineral empire " as we see it in this current volume and as it was portrayed |  | | Book (volume) | | Carolina, South Carolina, Tennessee, Virginia, and West Virginia VOLUME 3: THE NORTHWESTERN QUADRANT ...description of the type (and often the quality) of the rock, mineral, or fossil material to be found there,...south, then 5.3 miles west to cattle-guarded road on right; go 2.2 miles south and west on this dirt road...long; better specimens eroding from ledges on the slope of the mountain at elevation 1600ā to 1700ā. Agate...Agate, fire. Chalcedony: white, pink; roses. Quartz, rock: crystals; many mediocre, some fine; many worn, |  | | Report (volume) | | elsewhere, are shown on other maps of the State (see especially Fischer and others, 1946). MINERALS...lead to the discovery of a new mineral or a new crystal form. He can surely use the description for planning...from 1ninerals. FĀ·xcept for native gold and the rock-forming minerals that comprise construction materials...galena that had been recently found in the Tenmile district, Summit County. In his booklet, which today would...increase in numbers of amateur mineral collectors, or "rock hounds" during the past decade or two. Concurrently |  | | Book (edition) | | Division of Litton Educational Publishing, Inc. 135 West 50th Street, New York, N.Y. 10020 To the late...interests in earth sciences Acknowledgments I am deeply grateful for the unstinting help given me... California, E. M. Gunnell, Ltd., Woodville West, South men Minerals, and Company, London, ...compound names - Major mineral classes CHAPTER 4 CRYSTAL GROWTH bi Crystals from melts, solutions and...crystals - Internal imperfections of crystals - Crystal and aggregate habits Twinning CHAPTER 5 GEOMETRY | | | Book (edition) | | St., Princeton, New Jersey (Principal Office) 24 West 40 St., New York 18, New York D. VAN NOSTRAND COMPANY...sciences . .............. ā¢ Acknowkdgments I am deeply grateful for the unstinting help given me...Denver, Colorado, Specimen Minerals, Ltd., Woodville West, South Australia, Gregory, Bottley and Company,...compound names ā¢ Major mineral classes CHAPTER 4 CRYSTAL GROWTH 57 Crystals from melts, solutions and...crystals ā¢ Internal imperfections of crystals ā¢ Crystal and aggregate habits ā¢ Twinning CHAPTER 5 GEOMETRY |  | | Report (issue) | | Manhattan Island. 4āQuartz, var. Amethyst (purple), West Paterson. N. J. 5āGarnet, var. Spessartite (orange-red)...Street, Manhattan Island. 7āDatolitc (pale green), West Paterson* N J 8ā Quartz, var. Smoky (brown), Broadway...several lists covering various sections of the district which have been published from time to time in...lists, and the names of many others, new to the district, and discovered in recent years, have been added...technical matters relating to tho mineralogy of the district from the following: S. G. Gordon, A. C. Hawkins |  | | Book (edition) | | the use of polarizing plastic film for testing crystal fTagments introduces concepts of oplical mineralogy...compound names ā¢ Major mineral classes CHAPTER 4 CRYSTAL GROWTH 57 Crystals from melts, solutions and...crystals ā¢ Internal imperfections o f crystals ā¢ Crystal and aggregate habits ā¢ Twinning CHAPTER 5 GEOMETRY...Cell shapes ix 106 CONTENTS X and systems ā¢ Crystal axes ā¢ H ow faces are related to axes ā¢ Axial r...symmetry ā¢ Reflection of crystal structure in faces ā¢ Faces a nd forms ā¢ The crystal systems ā¢ The contact |  | | Book (edition) | | Area Mount Antero Area Sedalia Copper Mine Turret District 9 7 13 20 26 27 27 29 30 32 33 36 36 37 38 38...G ā Buena Vista to Colorado Springs, U. S. 24 Crystal No. 8 Mine Clora May Mine Antero Junction Hartsel...Mine Spruce Grove Camp Ground Teller Pegmatite Crystal Peak Area Petrified Forests Segment H ā Salida...Bremmer Dike Colorado Springs Area Crystal Park St. Peters Dome District Segment J ā Colorado Springs to...iDurango i^ccm ar Canon y JUiĀ£A<* any Tri^y am many more await the collector in Coloradoās mountains |  | | Book (volume) | | with Prase. ; - Mor, purple. Ladder road and west side of the Dee, on the right of the Strath...greenish-grey. south-west of Ben Vuroch, Blair Athole, earthy, banded brown and grey. Fifeshire west side of Largo...and he foresaw that he could no longer hope to see the book completed in his own lifetime, he made over...Currie, who has much of the ground, especially on the west coast of Scotland, from which Dr Heddle collected...to occur, in Scotland. Wherever possible, the crystal forms of the original minerals are given, with |  | | Report (issue) | | publication have also been corrected. Photo 1. Crystal clusters require tender care in the extraction...durable wall facing is a popular use of amethystine rock as shown in this picture of a highway restaurant...Pointā to the aesthetic appreciation of the clear crystal referred to in names like Amethyst Bay in Thunder...the attire of many a devotee. In natural form, crystal clusters of amethyst highlight mineral collections...Amethyst is a variety of one of the most common rock forming minerals, the transparent and glassy mineral |
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West slope, Ritterkopf, Ritterkopf massif, Rauris, Zell am See District, Salzburg, Austria