 | | Catalog/List | | t::_: •.·'':{}j;,·}~t' MM - T 'N Fl. P. R. - crystal crystalled crystalline crystallized micromount...ALLEMONTITE An intergrowth of arsenic and antimony Germany Harz Mountains, Andreasberg Rich gray botryoidal...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 | | 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...by Gloucester Typesetting Co. Ltd. Printed in Germany Contents Translator's Foreword 4 Foreword |  | | Book | | this book is a systematic look at the mineral and rock materials that have been used from prehistoric times...extensive mineral and rock species index to see all references to a specific rock or mineral. This book...(practicing and in training) who deal regularly with rock and mineral artifacts. Geoarchaeologists, diverse...properties. There is some overlap in the coverage of rock materials in this chapter with Chap. 6, which covers...chapter important uses are noted, e.g., examples of rock sculptures are discussed in both Chaps. 6 and 11 |  | | Book | | immensely popular handbook of minerals appeared in Germany I obtained a copy fo! my personal library and was...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 |  | | Journal (article/letter/editorial) | | THE OCCURRENCE OF PRECIOUS STONES. 577 Rock crystal .......................................... ...whichsoreadilyalters,is usuallyfoundeitherin very fresh rock or as detrital material in desert regions. Production...Czecho-Slovakia ........ 975,o0o France ................. Germany ............... 79o,ooo Great Britain ...........4 ................. Tourmaline 5 ........... Rock crystal o .......... Rose quartz 4 .......... Spodumene...magmatic waters-Amethyst e ............. 25,0oo Rock crystal • .......... •I,OOO Gold quartz ........... |  | | Catalog/List | | crystals attached to prism faces of l£x5 Quartz crystal, $7.00. ANGLESITE, Tsumeb, South West Africa. Large...crystals and matrix, Schneeberg, Germany, 2zx5, $5.00. Native Arsenic with rock, lxl, 750; 1x2, Si. 50; 2x2...Parral, Chihuahua, Mexico. A recent find. Choice crystal groups of large (i" to 1") crystals. Bright metallic...covering matrix, l£x2, $5-00. AXINITE, Japan. Brown crystal, fxl, $2.00. Variety: Manganoanaxinite, Italy....South West Africa. Dark blue sharply terminated crystal groups. Mined many years ago. Some with malachite |  | | Journal (article/letter/editorial) | | stones: garnets (pyrope and almandine), quartz (rock crystal, smoky quartz, citrine, amethyst, and chalcedony)...that a section normal to the longer axis of the crystal shows a crosslike pattern); this mineral is a...quartz (aventurine bowenite, Lapis lasuli), and rock crystal. Further he reports that, along with the above...This is a low vase, with bowl and foot cut from rock crystal from Madagascar colored enamel and gems adorn...turned out to be made of finegrained carbonate rock (black calcite). The materials of his trench coat |  | | Journal (article/letter/editorial) | | Rock Crystal and Diamond Pijies in Brazil. Ill Rock Crystal and Diamond Pipes in Brazil. By KOBERT...searching for the pure variety of quartz known as rock crystal the writer followed the trail of pebbles in...highest part of the high plateau. The fundamental rock of these regions is granite and gneiss—the " fundamental...this granite plateau there exist long ridges of quartzite (6). Tectonically there are only two ridges —the...writer's visit to Brazil the exploitation of the rock crystal was entirely in the hands of Germans and our |  | | Journal (issue) | | - ----~- CHIPS FROM THE QUARRY (Formerly the Bulletin Bowel) Spedal Rock Cryatal Number In this issue...issue we are presenting a series of articles on rock crvstal, one of our most popular minerals. We have...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............................ |  | | 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 |  | | Book (edition) | | formula, allegiance to a mineral group, symmetry and crystal structure as well as the strongest X-ray powder...and opaque minerals. More attention is paid to crystal habit or aggregate development and their sizes...species must contain chemical formula, structure (crystal system, space group, and unit cell dimensions)...units (A), expressed differently according to the crystal system: only a for the cubic system, a,c for the...specifying the orientation of the crystal faces in relation to the crystal axes, a set of three or four numbers |  | | Book | | purchased or traded. After introducing the main rock types this guide concentrates upon the places which...Michael O’Donoghue Proustite (East Germany) 7 Rocks We can define a rock as a large mineral body which... 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 |  | | | | 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) | | peaks indicate that the impurities are in the crystal structure. The chemical analyses for the orange...four channels may radiate from an unidentified crystal (Figure 2). © Gemmological Association and Gem...the last phase all was covered by colourless rock crystal so this quartz-tourmaline stone is a sort of...stone described as a moonstone was purchased in Germany and probably comes from Sri Lanka, where a similar... 451 464 Figure 3: View looking north of the quarry workings. Photo by Douglas Nichol. The host contact |  | | Book | | properties, and includes a glossary of important rock names and petrographic terms. The third section...book to track down the names of their mineral, rock, or gemstone specimens, and has at the same time...pre-eminence to British localities and adapting the rock classifications, where necessary, to conform with...Earth Dc 50 e229 The Main Rock Categories .. 50 Bi ne eel The Rock-forming Minerals .. , aie...mere Iv. Minerals illustrating Mohs’ scale Vv Rock-forming minerals: Dt Bre on 4 te: a Bc Si |  | | Journal (article/letter/editorial) | | (Report by W. H. HUDLESTON, Esq., M.A., F.G.S.) The rock-forming minerals constituted the principal subject...Occurs as quartz in granite, gneiss, mica schists, quartzite, sandstones, and quartz-porphyry (elvans); in...six-sided pyramids of small size. The form of the crystal of qnartz when free 'to develop is that of an hexagonal...between the prism and the pyramid. A very fine crystal, recently presented by Mr. John Arthur Phillips...diminished percentage of silica in the rock so decomposed. Fine rock crystals, penetrated by chlorite, tourmaline |  | | Catalog/List | | small, silvery e;ranular developcd in greyish Quartzite matrix.¾x¾ 11 ,m.75p. xtl .areaa 21. CASSITERITE...xtl's to about 1 11 in length,forming a cavernous crystal mass partially infilled with tiny needly xtl's...sharp f,ragonites.3x2ix2 82. NATROLITE" Dean Quarry,St.Keverne,Lizard,Cornwall. Exceptional,fine thick...s3.oo. 87. PARALAURIONITE/MENDIPITE.Mearhcad Quarry,Nr.Wclls.Somerset. bright-yellow developments formed...in 92. PROUSTITE/NATIVESULPHUR. Schlema,Saxony,Germany. Very nice old specimen Rich clusters and scatter |  | | Journal (issue) | | Idar-Oberstein 2, Germany 2. Die Villa, Bruckenstrasse 22, D-54290 Trier, Germany ABSTRACT: A Santa...made by Hans Dieter Krieger of Idar-Oberstein, Germany (Figure 1). Details of the stone's internal features...2001 The seventh GAGTL tour to the gem centre of Germany The itinerary wilt include: • German Gemmological...due to the small size of the stone, so a single crystal diffraction pattern from the whole stone was obtained...market, such as dyed blue chalcedony, dyed blue quartzite and blue opal. In 1998 we found another material | | | Book | | properties, and includes a glossary of important rock names and petrographic terms. The third section...the book to track down the names of their mineral, rock, or gemstone specimens, and has at the sa111e time...pre-eminence to British localities and adapting the rock classifications, where necessary, to conform with...and Composition of the Earth The Main Rock Categories .. The Rock-forming Minerals .. Alphabetical Description...scale 53 v Rock-forming minerals: 1 68 v1 Rock-forming minerals: 2 85 VII Rock-forming minerals |  | | Journal (issue) | | rare species from a new locality . Magnificent crystal lizations , which in color , lustre , perfection...rank away in advance of the numerous nature- hewn rock arches found throughout the world, and leaves a...just such a place, where nature had supplied the rock for a giant sculpture, gathered the little chiselling...the usual ex perience of travellers in that rough, rock-ribbed land, following canons, climbing over stones...natural bridge. As they turned an angle of a towering rock the giant arch suddenly burst on their sight, and |  | | Book | | This book provides a basic introduction to the crystal structure of minerals, as well as illustrations...pressures and temperatures. Immense quantities of rock and their constituent minerals are altered and destroyed...crystals are considered to be a mineral called crystal structures. Natural crystals formed by geological...laboratory-grown (synthetic) because they grow in rock. crystals, although identical to their natural...are not considered to be minerals. Microcline, Crystal Peak, Colorado, USA * 12 x 9x 5 om MINERALS: |  | Zim, Herbert S., Shaffer, Paul R., Latimer, Jonathan P., Nolting, Karen Stray, Post, Jeffrey, Pohwat, Paul W. (2001) Rocks, Gems and Minerals - A Guide to Familiar Minerals, Gems, Ores and Rocks. St. Martin's Press, New York. | Book (edition) | | Illustrated by RAYMOND PERLMAN FOREWORD GOLD CRYSTAL For more than a generation this book has introduced.............. Physical and chemical properties, crystal form, hardness, cleavage, chemical 14-30 —... Precious, semiprecious, and synthetic stones. ROCK-FORMING MINERALS ............. Minerals important...familiar with the pictures of minerals, rocks, and rock structures. This may enable you to identify some...every roadcut, bank, cliff, excavation, or quarry exposes rocks and minerals for you to see. Learn |  | | Book | | been properly depicted in books. In addition, the rock types commonly used in Finland as gemstones, are.... . . . . . . . 196 13 Striped quartz-epidote rock in Iisalmi . . . . . . . . . 199 Breccias and mylonites...201 Finnish speciality, rock types as gemstones . . . . . . 19 Serpentine rock in Ankele . . . . . . ... . . . . . . . . . . . . . . . 104 Fuchsite quartzite . . . . . . . . . . . . . . . . . . . . . . ....in 1990. Risto is specialized in natural stones, rock aggregates, industrial minerals and gemstones. He |  | | Book | | wonder of nature. Often emanating from the parent rock in brilliant colours and weird and wonderful textures...minerals are a visual treat, and check-boxes on crystal habit, colour, lustre and specific gravity will...processes such as tectonic movements, volcanoes, rock and ore formation, and looks at the physical and...Ant hony Duke. Anthony Duke also supplied the crystal structure diagrams appearing throughout the Directory...to take when handling, identifying or collecting rock and mineral specimens; however, we cannot accept |  | | Journal (issue) | | , CONTENTS FOR DECEMBER, 1945 CHIPS FROM THE QUARRY ......... :......................................··········· .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...Whole No. 17J A METHOD FOR THE CONSTRUCTION OF CRYSTAL MODELS. 1 ia ,ituat1ill 3 ll the Ln the loca10' |
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