 | | Book |
| essentials of crystallography, chemistry, and crystal structure. These provide a firm basis for discussion...crystallography at the beginning of the text, crystal systems and associated conventions and terminology...minerals in order to avoid those lamentable errors in crystal forms and colors which are instantly apparent to...slightly reduced, and a few enlarged, as the diamond crystal of Plate 1, depicted in both natural and greatly...this is not simple and straightforward. 'Mineral', 'rock', and 'stone' are used indiscriminately as e9ujvalents |
 | | Journal (article/letter/editorial) |
| Angeles 37, Calif., sent R & M a loose one inch rock crystal containing tiny scheelite crystals. The specimen...Cochise Co., Ariz. These scheelite inclusions in rock crystals are rare and make valuable specimens for...under the Mineralight; in addition the quartz crystal has a colorless phantom in it. Arkansas—The most...Michigan, Ann Arbor, Mich.) The Micanite pegmatite district lies across the Park-Fremont County line in south-central...village of Micanite. The pegmatite of the Micanite district contains unusually large 378 ROCKS AND MINERALS |
 | | Journal (article/letter/editorial) |
| desired. Please send them in. Abbreviations: xl—crystal xled—crystallized fl—-fluoresces ALABAMA—The...Murfreesboro, Pike Co., Ark. This is in the cinnabar district of Howard, Pike, and Clark Counties, Ark. This...suggestions?" A nice six-inch doubly terminated rock crystal, and a beautiful rutilated quartz cabochon (colorless...xls of rutile) have been donated by the Ken Dor Rock Roost (The McClures), 419 Sutter Ave., Modesto,...40-ft. thickness of the sill is exposed, to its upper contact with intruded shales. The fine-grained diabase |
 | | |
| What is the difference between a mineral and a rock? Where do they come from? How do Istart collecting...rocks, and how to test them. : Each mineral and rock is accompanied with concise descriptions and precise...photographs; Bob Gault took a number of the mineral and rock photographs; Donna Naughton took a number of field...mineral and rock descriptions. introduction Mineral and Rock Collecting Mineral or Rock? Origins of...Non-metallic Mineral Identification Key How to Identify a Rock Geological Regions of Canada ©) en, Sey SP It lex) |
 | | Journal (issue) |
| , CONTENTS FOR DECEMBER, 1945 CHIPS FROM THE QUARRY ......... :..................................................................... EMERALDS IN AUSTRIA ················································...··········· .A METHOD FOR THE CONSTRUCTION OF CRYSTAL MODELS. By Horace R. Blank ......................PEEKSKILL, N. Y., U. 5. A . The official Journal of the Rock• and Minerall Aaociation 582 582 582 583 587 587............................... . CHIPS FROM THE QUARRY This is indeed a Merry Christmas for the world |
| | |
| that is, chemical formula, physical properties, crystal system, and most important to you as a collector...which we cannot possibly deal with at length here— crystal structure. Crystallography is a whole sub¬ division...the mineral as well as to reveal characteristic crystal shapes and forms. | The atoms making up minerals...the material to develop into crystals. What is a crystal? Merely a solid body, often displaying plane natural...balance. Growing space is usually limited and crystal growth frequently is hindered. Consequently, minerals |
 | | Book (edition) |
| is, chemical formula, physical properties, crystal system, and most important to you as a collector...which we cannot possibly deal with at length here— crystal structure. CrysraLLoGRAPHy is a whole sub- division...property material Merely to develop a solid crystal body, into crystals. often which which What...What displaying gives each allows the is a crystal? plane natural surfaces called faces, which reflect...balance. Growing space is usually limited and crystal growth frequently is hindered. Consequently, minerals |
 | | Book |
| minerals, will find the book invalu¬ able. Each rock or mineral is dealt with systematically and defined...tion appearing opposite a colour photograph of the rock in question. For the layman, there are clear defi¬...a guide only since the International Society of Rock Mechanics is currently drafting tables for general...these properties may vary so greatly within one rock type that such figures should only be considered...bothers to stoop and pick up a piece of limestone, gneiss or granite? And yet, it is these rocks which shape |
 | | Book |
| Sapphire Quartz Malachite 47 Azurite 48 Rock crystal 88 Selenite 52 91 Celestite 92 Rose quartz...which established that the external form of a crystal is a characteristic property of the mineral. In...of instruments for measuring the angles between crystal faces and for conducting optical studies, and in...fully-developed crystals with geometrical forms. The word 'crystal' is commonly taken to refer to this external geometrical... but in fact the defining characteristic of a crystal is its internal structure - it is a solid with |
 | | Book |
| purchased or traded. After introducing the main rock types this guide concentrates upon the places which...Proustite (East Germany) 7 Rocks We can define a rock as a large mineral body which may contain only one... Petrologists, who study rocks, recognize three rock classes and within each class a large number of...Basalt arises from a lava solidified into a black rock, containing no quartz but rich in the feldspar minerals...rocks as seams (known as dikes). When the intrusive rock forms masses parallel to the structure of the rocks |
 | | Book |
| macro lens with twin electronic flash. Close-ups of rock specimens were taken in a similar way, though some...pinacoid. BASIC: A term referring to an igneous rock with less than io per cent free quartz and a total...content between 45 per cent and 55 per cent. Such rock consists mainly of plagioclase feldspars and pyroxene...including quartz and obsidian. CONCRETION: A mass of rock usually rounded in shape and a few inches in diameter...processes which turn soft sediment into consolidated rock. These occur near the surface of the Earth at low |
 | | Book |
| photographs; Bob Gault took a 11un1ber of the mineral and rock photographs; Donna Naughton took a nun1ber of field...mineral and rock descriptions. . .. Introduction Mineral and Rock Collecting Mineral or Rock? Origins...Non-metallic Mineral Identification Key How to Tdentify a Rock Geological Regions of Canada 6 6 6 7 7 8 10 11...Minerals and Rocks IX Introduction Mineral and Rock Collecting or most of us collecting is a natt:u-al...a healthy, active, outdoor life. F Mineral or Rock? Mineralogists would define a rnineral as one or |
 | | Catalog/List |
| Micromount and Fluorescent columns . PETROLOGIC (ROCK) SPECIMENS ....... MINERAL DETERMINATION SUPPLIES...SUPPLIES including Blowpipe Testing.......... . xl - crystal xlled - crystalled xlline - crystalline xllized...County, Arizona. Sharp hexagonal barrel-shaped crystal druse. Many of the crystals exhibit a cavernous·...mina Ojuela. White-to-pale yellow sheave-like crystal FI. 1. 00 groups on limonite ................ Mexico...of Huesca, Estopinian. �ue mass in ancient trap rock, rare ...... AFWILLITE Hydrous calcium hydroxy-silicate |
 | | Book |
| Superb full-color photographs depict the primary rock types and a comprehensive selection of magnificently...surface of the earth, minerals make up the rocks. A rock may be composed of a number of different minerals...animals there are not very many different kinds of rock nor mineral, anditisnot difficulttolearn about...This book is intended to introducesome of the major rock and mineral species in the hope that their beauty...material to which many fine crystal specimens may be attached. All rock (the mineralogist calls matrix |
 | | Book |
| to take when handling, identifying or collecting rock and mineral specimens; however, we cannot accept...geological site before entering the site or removing rock and mineral specimens, and note that these may vary...by Anthony Duke. Anthony Duke also supplied the crystal structure diagrams appearing throughout the Directory...photographs were provided by the following: 2 (Granite rock exposed at Tarn (Midi-Pyrenees), France), Nature...Faults 18 Volcanoes 20 Igneous Features 22 The Rock Cycle 24 Flow Igneous Rocks Form 26 Flow Sedimentary |
 | | Journal (issue) |
| Conklin Famous mineral localities: the Gillette quarry, Had dam Neck, Connecticut . . . . . . . . . ....two exciting parts of the process, such as the crystal structure. Lastly, pick one with a track-record...SPECIES Fine Mineral Specimens Wholesale & Retail Rock Trimmers & Hardwood Thumbnail Cabinets Send want...included over a hundred specimens from the Batopilas district, Chihuahua, Mexico, 73 of which were specifically...Canada (5 specimens), the Bell mine in the Butte district, Montana (1 specimen), and the Gould & Curry mine |
 | | Journal (issue) |
| MONTHLY Contents for May, 1945 CHIPS FROM THE QUARRY ................................................................................... GLOGCNITZ, AUSTRIA, CAPTURED BY RUSSIANS ........................................... .... ......... CHIPS FROM THE QUARRY ............. . .................................specimens consist of a rock of a dark gray color resembling basalt. This rock was intensely brecciated...in many parts of the county, but those from the Upper Providence township were magnificent specimens. |
 | | 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... Diatomite (fig. I) was first reported in the District in 1923 (Vanderburg, 1936) on the west side ofTrinity...(EPM) who developed four open-pit mines in the District (Johnson, 1977). The diatomite consists of the |
 | | Catalog/List |
| invited. ABBREVIATIONS used in this catalog xl -crystal xlled -crystalled xlline - crystalline xllized...············································ 28 ROCK AND MINERAL COLLECTIONS······················-·...Black glassy crystals imbedded in camptonite dike rock .................. . TREMOLITE Calcium magnesium...Mountains, Marysvale ~ink crystalline mass, same crystal vugs .... AMBL YGONITE Sodium lithium aluminum... Arassuahy Transparent brown-green pleochroic crystal prisms ¼"to ½" $. 25 each 5/$1. 00 ....... Czechoslovakia |
 | | Catalog/List |
| t::_: •.·'':{}j;,·}~t' MM - T 'N Fl. P. R. - crystal crystalled crystalline crystallized micromount...opalescence ................... PERICLINE Italy, Austria 1 SWitzerland Aleine areas Fine large white twin...Mountains, Marysvale ----i'>ink crystalline mass, some crystal vugs ALTAITE Lead telluride Colorado Saguache County... Norway Kragerp Pure dark green cleavages and crystal sections .. Norway Kragerp ~JJ laq? lustrous dark...Island of Linosa --Lustrous black rectangular crystal sections : 'I to ~II $, 25, 5/ $1. 00, • • • • |
 | | Book |
| along which an oceanic plate descends into the upper mantle is not the site of its complete disappearance...3.56, hardness 10). Carbon crystallized in the upper mantle (at a depth over 100 km) as diamond, together...gamet-phiogopite peridotite (kimberlite) of the upper mantle, during which the volatiles mentioned above...spaced pipes (Mitchell, Crocket, 1971). Diamond is a rock-forming accessory mineral of kimberlite (content...rocks that were penetrated by it (amphibolite, gneiss) and ultrabasites of a similar composition and |
| | |
| almost two decades. Robert Jones is Senior Editor of Rock & Gem magazine. A graduate of New Haven Teachers...Cycle * Rock from the Deep ® Rock from Sediments * Geodes* Changed Rock ® Cosmic Rock Rock Records "..." Deep Time ® Fossils * Reading Rock " The Great Unconformity 44 SECTION TWO MINERAL KINGDOM Mineral...CoLLecTrors’ WIsDOM The Art of Collecting * # = * Rock Hunting Cleaning & Cataloging Identifying Minerals...Identification Flowchart # Identifying Rocks * Rock Identification Flowchart 94 174 Identification |
 | | Book |
| Burchard • Bode . Frontcover Upper left: The observatory at Kremsmunster. Austria. which houses the mineral...mineral collection. Upper right: Pyromorphite crystals from Pribram. Czechoslovakia. Natural History Museum...mineralogical cabinet of the convent at Kremsmunster, Austria. The . specimens a~e displayed m baroque furniture...important mineralogical museums in Western Europe Austria Belgium Denmark Finland France Germany (Federal...half are in Germanspeaking countries (Germany, Austria, Switzerland). The reasons for this are partly |
 | | Journal (issue) |
| 3.50 ADAMITE, Laurium, Greece. Minutely xld. on rock. 4x l '.'2 ........ . 5.00 STIBNITE . Felsobanya...1.25 FLUORITE. Weardale. Twinned lilc:c xis . on rock. 4x2 l/2x2 ~'2 ....... . 3.00 SIDER ITE, Cornwall...mass. 3x2x I ' '2 3 .00 CUPRITE. Bisbee. Xld . on rock . 2 ½ x2 - ... .. ...... ... . ......... . 12 .50...APATITE. Ehrenfrieder,;dorf Lilac tabu1;:ir xis. on rock. ?xl 112 . . . . . .. 3 .00 1.25 PHODOCHROSITE ...CHABAZITE v. PHACC LITE. Bohem'a . Small x's. e n rock. 3x2 ... . . . HUGH A. FORD OFFICE AND SHOWROOM: |
 | | Journal (issue) |
| loosely aggregated, and passing into a compact salite rock. There are other specimens in which the same white... I These specimens were found at Sodom, in the upper end of the Tyringham Valley, in the pro-Cambrian...several specimens of what we then called mortised rock, and I be lieve your specimen from Pittsfield is...important iron mine, clay, sand, or marl bed, stone quarry, or fossil bearing for mation is represented; and...structural geology. Its twenty-four drawers and upper case are filled to overflowing with good samples showing |
