 | | 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 |  | | 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 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: |  | | Book | | Manganese and iron dendrites. Solnhofen, Bavaria, Germany. Photo 60xl20 mm, sample 200x100xl5 mm. Historia...Geology (surveying and documenting of resources: salt, rock resources, ores, coals), Department of Environmental...pollution, geological-engineering examination ofland and rock massifs), Department of Geoinformatics and Applied...go z użytku. Flint is a sedirnentary, silicate rock. lt usually occurs in the form of lumps, nodules...limestone in Central and Western Europe (Poland, Germany, Denmark, France and England), it can be also found |  | | Book (edition) | | Thesaurus am Guide to Indexing Fourth Edition Crystal S. Palmer, Editor 7 ia Published by th AMERICAN...groups of new terms have been U.S. county names; rock-formation names (mostly North American); geophysical...granite-granodiorite family was eliminated. Many specific rock types which had been autoposted narrower terms under...include local geographic terms, U.S. county names, rock-formation names, and fossil names. Indexing for...more than 12. The same applies to North American rock-formation names mentioned in the indexed literature |  | | Book (edition) | | and Polishing of Gems 69 Engraving on Stones 17 Crystal Systems _ 20 Hardness Deposits and Production...170 Jade (Jadeite and Nephrite) bees Species Rock Crystal 132 Ni ee Smoky Quartz 132 ype haha eens...gratitude to Prof. Dr. Hermann Bank, Idar-Oberstein/ Germany, for making many rare collector gemstones available...thank Mr. Hans Walter Lorenz, Idar- Oberstein/Germany, who cut numerous rare gemstones specifically for... used for making jewelry, include amethyst, rock crystal, amber, garnet, jade, jasper, coral, lapis lazuli |  | | Journal (issue) | | original photograph shot by his own hand) showing crystal habits and symmetry together with an explanatory...Institute of Gemstone Research, University of Mainz, Germany 4. Earth Science, Department of General Science...the Institute of Gemstone Research, University of Mainz for his support also. Furthermore we would like...Douthit, T.R., 1993. Heat treating the sapphires of Rock Creek, Montana. Gems & Gemology, 29(4), 250-72 Emmett...Spurenelementen in Korund: Ph.D. Thesis, University of Mainz, 170 pp The role of Be, Mg, Fe and Ti in causing |  | | Journal (article/letter/editorial) | | mentioned came from vein, or nodule, or massive rock. In Dr. Gustav Bischof's" El ements of Chemical..."t The countries where the best specimens of Rock-crystal are found are enumerated in the many books on...origin, but further altered into a more crystalline rock, or, lastly, the mica may have been developed by...yielded 1000 cwt. of rock-crystals , one crystal weighed 800lbs. (Shepard], The crystal-hunters hang over..."Bagshot Diamonds," or subangular pieces of quartz. crystal, in the Post-Tertiary Gravel of Berks and Surrey |  | | 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 |  | | 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 (edition) | | Gemstones 14 Origin and Structure of Gemstones 17 Crystal Systems 20 Properties of Gemstones 20 Hardness...Tanzanite 132 Quartz _ Gemstones 86 Diamond Rock Crystal 132 Smoky Quartz 132 Amethyst 134 _ & Diamond... used for making jewelry, include amethyst, rock crystal, amber, garnet, jade, jasper, coral, lapis lazuli...(even those that are colorless). Rock With regard to gems, a rock is a natural aggregate of two or more...lazuli is an example of a gem that is classified as a rock. It forms independent geological bodies of greater |  | | Book | | Mineral Formation External Form of Minerals Crystals Crystal Symmetry Appearance and Development of Crystals...Crystals Aggregates Growth of Twin Crystals Crystal Faces Pseudomorphs Physical Properties of Minerals Specific... perfect lustre and the regularity of form of crystal have long had a particular charm for man. This...identification keys and books depict idealized crystal forms. In nature, however, such forms are very...colour (see plates) but also in crystal form, e.g. the many crystal forms of calcite. Perfect models |  | | 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 |  | | Report (issue) | | crystals), Felton's farm (Chester), and Ward's quarry; Montgomery County: Sumneytown, and Perkiomenville...Philadelphia: Fairmount Park, Frankford, and Rit- enhouse quarry. SCOLECITE CaAl 2 Si3 Oi .3H 2 O MONOCLINIC ...white radiating tufts; Delaware County: Ward's quarry, mealy white radiations. DESCRIPTIVE MINERALOGY...mines, the corundum mines at Unionville, Brinton's quarry south of West Chester, and the French Creek iron...illustration selected is the symbol of Brinton's quarry, three miles south of West Chester. REFERENCES |  | | 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............................ |  | | Book | | Gubelin, Lucerne Typesetting: Satz Weise, Fohren, Germany Photolithos: Job Color srl, Gorle (Bergamo) Printing:...gemstones Corundum: the colorful palette Ruby: divine crystal spark Sapphire: symbol of the firmament Beryl:...patrician from black africa Topaz: chalice of golden crystal Tourmaline: alpha and omega Zircon: dizzying quick-change...attributable to Above: The octahedral diamond crystal sits on an ultramafic garnet-lherzolite. It came...Opposite: Magnificent, euhedral crystals, emerald crystal on calcite and quartz from the hydrothermal deposits | | | Book | | Mineral Formation External Form of Minerals Crystals Crystal Symmetry Appearance and Development of Crystals...Crystals Aggregates Growth of Twin Crystals Crystal Faces Pseudomorphs Physical Properties of Minerals Specific... perfect lustre and the regularity of form of crystal have long had a particular charm for man. This...identification keys and books depict idealized crystal forms. In nature, however, such forms are very...colour (see plates) but also in crystal form, e.g. the many crystal forms of calcite. 7 a i ■ I II |  | | Journal (issue) | | influential family of gem carvers in IdarOberstein, Germany. 423 Akoya Cultured Pearl Farming in Eastern...• Gota de aceite in a Zambian emerald • Dyed quartzite imitation of ruby-in-zoisite • Synthetic moissanite...Vesuvianite crystal in ruby • Wollastonite blizzard in manufactured glass beads • Quarterly crystal: Shattuckite...Nantes, France Lucerne, Switzerland Hamburg, Germany Eloïse Gaillou Ren Lu Fanus Viljoen Paris,...of gem carvers: the Drehers of Idar-Oberstein, Germany. The authors focus on the contemporary craft of |  | | 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 | | of the Deutsches Bergbau-Museum in Bochum, West Germany, Professor J. C. Becker of the University of Copenhagen...USA, Fig. 93; German Mining Museum, Bochum, West Germany, Figs 19, 20, 42, 46, 52, 55, 56, 57, 81; Institute...USA Fig. 64; Museum of History, Cologne, West Germany, Fig. 69; Museo de Prehistoria, de la Excma, Valencia...Romisch-Germanisches Commission, Frankfurt, West Germany, (Germania), Figs 68, 98; Society of Antiquaries...Tundra in NW. Europe Forest pine in S. France and Germany Return to colder conditions Mesolithic — Holocene |  | | 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 |  | | 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' |  | | Book | | ago, he learnt to work stone (at first flint, quartzite and hornfels) and to make dyes from them (e.g·...spaced pipes (Mitchell, Crocket, 1971). Diamond is a rock-forming accessory mineral of kimberlite (content...differentiation of ultrabasic magma· An olivine-bearing rock (dunite or peridotite) can also be brought up as...bodies of apatite-rich rock usually occur at the contact of different alkaline rock types, which were formed... holocrystalline texture· Granite is a plutonio rock rich in quartz and 24 feldspar. Because of its |  | | Journal (article/letter/editorial) | | aquamarine (beryl) and was part of a broken gemmy crystal. and fine Magnet Cove collection. It would indeed...gully. About 2 / 3 way up Guy Hill is pegmatite quarry. Boulders of this material are laced with black...terminated, slender rock crystal, lightly stained brown by iron. Six small doubly terminated rock crystals (also...by iron) are grouped at the base of the large crystal. It is a beautiful specimen. Mrs. Lieser is the... Leave car and walk % mile west to a light gray rock (peridotite) exposed in a small stream south of |  | | Journal (article/letter/editorial) | | (Archean) and argillaceous sediment (Silurian). Rock decay has decomposed the granite and altered the...boulder beds separated by sedimentary clay. The crystal-bearing veins are probably of hypogene origin and...have occurred in Minas Geraes. INrnooucrroN Rock crystal has been mined in Brazil for many years. Early...for ornaments or optical purposes, much of the crystal being shipped to the Orient for cutting or carving...in renewed activity at many of the long known crystal producing localities. Quartz suitable for commercial |
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