 | | Book |
| about 25 articles. Milan Novák (1952, Vyškov, Czech Republic) Head of the Department of Mineralogy, Petrology...published in Czech Republic by Granit, s. r. o., Ditinova 10. 150 00 Prague 5, Czech Republic E-mail: i...reproduction by Studio W G . Prague Printed in Czech Republic by Finidr. s. r. o., Český Tčšín 06/23/03/01...References 15 20 28 Mineralogical Regions Czech Republic (Milan Novák) Hungary (Sándor Szakáll) Poland...85 114 Descriptions of the Mineral Species Czech Republic (Milan Novák). Hungary (Sándor Szakáll), Poland |
| | Book |
| published in Czech Republic by Granit. s. r. o.. Dninova I0. 150 00 Prague 5. Czech Republic E-mail: in...reproduction by Studio VVG, Prague Printed in Czech Republic by F111idr. s. r. o.. Ce ky Tesin 06/23/03/0............................................. 3 1 Czech Re public (M ilan Novak) ........................................................... 127 Czec h Republic (Mi lan Novak). Hungary (Sandor Szakall), Po land......................................... 397 Czech Republic (Moravia) ................................ |
 | | Report (volume) |
| Manga11ese Resources of the Artillery Mountains Region Mohave County, Arizona By S. G. LASKY and B. N...Structure map of the Artillery Mountains manganese region ___ ------------------------------------------... MANGANESE RESOURCES OF THE ARTILLERY MOUNTAINS REGION, MOHAVE COUNTY, ARIZ. By s. G. LASKY AND B. N...Artillery and Rawhide Mountains, but the richest and most extensive croppings, and the only ones that have...are used for the first time in this report. The most pronounced structural feature in the area is a thrust |
 | | Book |
| from different sources, vary? What causes the occurrence of varieties? Why do diamonds, unlike other precious...mining operations, production, and economy of the most important gem deposits-in some cases referring to...concept of the layout of the book, emphasizing the most important geological events leading to the formation...since next to dinosaurs, gemstones are among the most popular objects sought out by visitors to many of...the challenger was to a large extent correct. In most natural history museums gemstones are displayed |
| | Book |
| from different sources, vary? What causes the occurrence of varieties? Why do diamonds, unlike other precious...mining operations, production, and economy of the most important gem deposits-in some cases referring to...concept of the layout of the book, emphasizing the most important geological events leading to the formation...since next to dinosaurs, gemstones are among the most popular objects sought out by visitors to many of...the challenger was to a large extent correct. In most natural history museums gemstones are displayed |
 | | Book |
| represent excellence in natural history publishing. Most books in the PHalarope series are based on a nature...the earlier history, indeed the prehistory, of a region. Conglomerates speak of a time when high nearby...readers of all ages with the world in which we live. Most of us are so concerned with the business of making...identification may at times require special equipment that most of us do not have. Many minerals, however, may easily...guides on rocks and minerals are available, but most of them are too difficult for the general reader |
 | | Book |
| localities for good ilmenite crystals exist in the region (Brunet, I 977b ). NEW YORK Amity, Orange County...Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series of incompletely...Discm•t•ries, /960--20/ 5 ONTARIO Bentley Lake Road occurrence, Faraday Township, Hastings County. In fall 1994...site which they called the Bentley Lake Road occurrence, south of Bancroft. Sharp, flattened rhombohedral...specimens have come from an unusual calcite vein-dike occurrence with an exposure very near, indeed on the property |
 | | Book (edition) |
| judgment. These include all the common minerals and most of those of any special economic, geological, or...silicates are placed last. The silicates are the most difficult minerals and so they are reached after...III there is an elementary discussion of the occurrence, This includes a brief descripand association...(Glass and Hydrocarbons) PART 413 III THE OCCURRENCE, ASSOCIATION, AND ORIGIN OF MINERALS A. General...Verlagshandlung, Stuttgart, 1905. PART III THE OCCURRENCE, ASSOCIATION, AND ORIGIN OF MINERALS BECK (WEED): |
 | | Report (issue) |
| statements 212 Native elements 212 Graphite Occurrence 212 Alterations 21 2 The sulphides 212 ...marcasite 213 Occurrence 213 Alterations 214 216 fluorides Fluorite _ 216 Occurrence 216 Alterations...Alterations 216 The oxides 217 21 7 Quartz Occurrence 21 7 CONTENTS. MINERALS CHAPTER V. Section...Modifications 220 Tridymite Occurrence 220 Modifications 220 221 Opal Occurrence 221 Modifications 221...223 Corundum 223 Occurrence 223 Alterations 223 Hematite 225 Occurrence 225 Alterations 226 |
 | | Journal (issue) |
| new gemstone material that can also serve as the most convincing diamond substitute to date (see Figure...looking squarely into the top of a stone at the culet region; doubling is only seen when focusing deeper at...gemstone material in facets, but not in the culet region (here somewhat out of focus) because the view is...rhombohedral 15R ABCBACABACBCACB R3 ml etc. i. The most common polytype of moissanite in synthetic abrasive...material is 6H; 15R is the second and 4H the third most common polytype. The topic of this report is the |
 | | Book |
| Appendices summa rize the mathematics and chemistry that most rock and mineral collectors find helpful. --------...1-luman beings are the most intelligent creatures on Earth, and are among the most curious, whether or not...(K), 2.6 percent; and magnesium (Mg), 2.1 percent. Most minerals contain silicon and oxygen, and are called...noncrystalline solids are often called minerals also. The most common minerals in the Earth's crust are the so-called...have been identified by professional mineralogists. Most minerals are co1npounds-molecules made of two or |
 | | Book (edition) |
| Silicates: framework Structures (lectosilicates) 272 Opal Tridymite Cristobalite Silica Group: Quartz Coesite...Enstatite Hypersthene Diopside Augite Pigeonite Hadenbergite Aegirine-Augite Aegirine Jadeite Spodumene \Vollastonite...instrument. The polarizing microscope also reveals the most desirable course of action to be undertaken in the...through the use of special mineral mounts. The one most widely used is the thin section. Such a mount is...advantage. with the polarizing microscope. Probably the most widely employed application lies in the examination |
 | | Book (volume) |
| VOL.2 Bauer, Max Precious stones J FOX LAKE DISTRICT LIBRARY 2§| £ J3RAND AVENUE 60020 - PRECIOUS...STONES A POPULAR ACCOUNT OF THEIR CHARACTERS, OCCURRENCE AND APPLICATIONS WITH AN INTRODUCTION TO THEIR...STONES PACE D. Occurrence of Precious Stones I. NATURAL CHARACTERS AND . . G8 OCCURRENCE A. Chemical...Char¬ acters .138 CONTENTS VI TAGE TAGE Occurrence of Diamond 1. India .... 2. Brazil .... 3. South...Melanite, Topazolite . Tourmaline Opal Precious opal . Fire-opal Common opal . Turquoise . Bone-turquoise |
 | | Book (volume) |
| treasures to be found in North America, are perhaps the most fascinating—and the least known. Valuable gemstone...Jewelers and gemologists will find the latest and most accurate gem-identification data under each species...attempted to assemble mainly those facts which should be most useful to the student, the collector and connoisseur...Gemstones, embraces those minerals furnishing the most treasured gems of commerce. The next chapter is...El Paso, Texas. Information on the Virgin Valley opal deposits was given by G. Keith Hodson of Scottsdale |
 | | Book (edition) |
| suggested a number of features. All have contributed most generously of their time and experience, for which...ordinary thin sections. The mounted films are for the most part exceedingly thin, although coarse particles...that greatly increase its range of usefulness. The most distinctive are the polarizing and analyzing prisms...times should be of this type. are satisfactory for most work. en Objectives.—Achromatic objectives EA are...4-mm. achromatic objectives, will serve for ms 6) most studies. In the case of achromatic Fic. 9.—Sections |
 | | Book (edition) |
| the other hand, many readers, particularly those most familiar with Professor Rogers and his work, will...(Tectosilicates).236 Silica Group: Quartz—Chalcedony—Opal—Tridymite—Cristobalite—Lechatelierite—Coesite. Feldspars:...Enstatite—Hypersthene—Diopside—Augite—Pigeonite—- Hedenbergite—Aegirine-augite—Aegirine—Jadeite—Spodumene...sections with the polarizing microscope. Probably the most widely employed application lies in the examination...ordinary thin sections. The mounted films are for the most part exceed3 Precooked balsam may be heated to 100°C |
| | Book |
| Appendices summarize the mathematics and chemistry that most rock and mineral collectors find helpful. 4-- ...Earths atmosphere about 2 ago. Human beings are the most intel¬ billion years ago, permitting the extensive...support of animal life. The present oxygen the most curious, whether or not they’re content (21 percent)...Earths’ crust, eight of them make up al¬ oceans. most 99 percent of the crustal rocks by The hydrologic...all water on Earth magnesium (Mg), 2.1 percent. Most min¬ (including that in your blood right now) |
 | | Book (volume) |
| gem mining up to date. Here, then, is the latest, most complete information on North America’s gemstones...from one or more diamond-bearing kimberlite bodies, most likely in Canada. Systematic large-scale mining...certain other areas, as around the Great Lakes region. Numerous small discoveries of gem materials took...others, and set them down in what I believe to be the most reliable accounts. In this process I was aided by...2. Map of amber deposits in eastern Dominican Republic........cceseesseceersereenes Figure 3. Map of |
 | | Report (issue) |
| Professional Paper 177 THE GOLD HILL MINING DISTRICT U'TAH BY T. B. NOLAN UNItED STATES GOVERNMI£NT...andesites or latites_______ ___________ _ Hypersthene-augite latite _____ _ Trachyte_ _ _________ _ Rhyolites...______ ___ ___ ___ _ __ ____ ___ ______ Clifton district _ _ __ History of mining and production__ ___...119 II Mines and prospects-Continued. Clifton district-Continued. Mines and prospects-Continued. Veins...Evans__________ _________________ Willow Springs district. ____ __ _ __ ___ _ ____ ___ History and production_________ |
| | Book (volume) |
| gem 1nining up to date. Here, then, is the latest, most complete information on North America's gemstones...one or 1nore dia1nond-bearing kimberlite bodies, most likely in Canada. Systematic large-scale mining...certain other areas, as around the Great Lakes region. Numerous s1nall discoveries of gem materials took...others, and set them down in what I believe to be the most reliable accounts. In this process I was aided by... Map of amber deposits in eastern Do1ninican Republic.................................. 10 Figure |
 | | Report (volume) |
| districts.____-_--_-----_____-______---_ Bohemia district.._i_-_-__--_---_-_--_---___-______-_____---_--...areas and mining districts Continued. Bohemia district Continued. Mineral deposits._________________...areas and mining districts Continued. Bohemia district Continued. Mines and prospects Continued. Tall...___-_-___.-______-_-_____.__________._ Quartzville district..______-_----._______-_____-.-________-_-Location...areas and mining districts Continued. Quartzville district Continued. Mines and prospects Continued. Lawler |
 | | Book |
| Petrified Wood 131 Characteristics of Agates; Opal, Queen of the Gems; Petrified Wood; Commonly Occurring...Family Gemstones The Various Names and Forms of Agate Opal and Its Varieties Recommendations for Use of Polishing...gemstones, and minerals have always ranked among the most valued substances on earth and, in a multitude of...thirteen basic rock types. These included amber (most precious of the ancient gems), calcite, fluorspar...quartzite, rock crystal, amethyst, chrysoprase, opal, etc.), serpentine, and steatite (massive talc) |
 | | Book |
| you can check any specime n you have found. Th e most T he introdllction to this book gives a general...rocks and minerals. dealing with their formation, occurrence and the qualities to note when making an identification...he ="'· Asterisl<5 - - - - - + - - - denoie the most ll!ll)O<\an! d,S1m9u,sh,,,g fec:ures of rn,oe,a~... I Jptt:2.2uction surface, but is heavier than most crustal rocks. This guide describes many of lhe...element, for example platinum or gold. However. most are chemical combinations of two or more elements |
 | | Journal (issue) |
| Clarity Grading . . . “Chocolate Pearls”. . . Leopard Opal . . . Rainbow Andradite from Japan THE QUARTERLY...identifying these products. 236 Leopard Opal: Play-of-Color Opal in Vesicular Basalt from Zimapán, Hidalgo...Myanmar • Moonstone from Madagascar • Phenomenal fire opal • “Sunset” quartz from Brazil • Swedish Blue (slag)...considers the causes of the different types of graining most commonly encountered, and examines the methodology...on the clarity grade of a diamond. O ne of the most misunderstood features in diamond clarity grading |
 | | Report (issue) |
| ........ . Quartz monzonite porphyry.·.... . Occurrence and character .... . Petrographic details .....geology-Continued. 9 Epitome of the. geologic history of the 9 district .....•......................... 9 Part II. The... ILLUSTRATIONS. Page. I. Geologic map of the Yerington district, _ Nev ..•........ _.. _.... _.... _. . . In pocket...III. Geologic sections across the. Yerington 28 district; Nev. _. ___ .. __ .... __ . __ .. _. . . IV....Index map showing the location of the Yerington district, Nev......... . . . . . 10 · 2. Geologic section |
