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| Vojany, Slovakia) Head of the Department of Natural History, Eastern Slovak Museum, Košice He finished...His Ph.D. study was at the Technical University, Košice (1992). Until 1990, he worked at the Dionýz Štúr...(1983). Ph.D. study at the Technical University, Košice (2000). Since 1980, he was employed in the Herman...Poland (Ewa Kos/.owska) Romania (Gheorghe Udubasa) Slovakia (Rudolf Duda) Ukraine (Orest Matkovs'ky) 31 31...(Ewa Kos/.owska). Romania (Gheorghe Udubasa), Slovakia (Rudolf Duda). Ukraine (Victor Kvasnytsya) 127 |
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| emmo 0 Volume 28 N o . 5 January 2003 Chrome chalcedony Sky-blue glass / Brazilian imperial totiaz...However, the gemmological features, geological occurrence and inclusion characteristics of these samples...Gemm., 2003,28,5,257-264 A new chrome chalcedony occurrence from Western Australia Margot J. Willing...e-mail: nyanga@icenet.com.au ABSTRACT: Chrome chalcedony, an ornamental rock variety new to Australia...Australia, has been identified from an occurrence in the Newman area of Western Australia (WA). Formed by silicification |
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| additional occurrences of emerald, opal, agate, chalcedony, organic gems, tiger eye jasper, aragonite... FRONTISPIECE Tiger iron from the Ord Ranges, Pilbara region, displaying folded bands of dark brown hematite...eye jasper from the Mount Brockman area, Pilbara region. The sphere, approximately 35 cm in diameter, contains.......................................... 34 Cue region...................................................................................... 34 Yalgoo region .............................................. |
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| .......................................... 52 Slovakia ( Rudo lf Ducfa) ...............................(Ewa Koszowska). Ro mania (Gheorghe Uduba~a), Slovakia (Rudolf Ducfa). Ukraine (Victor Kvasnytsya) Native...xx = cry tals; coll. = collection. Q11ar1::., agate, (5.5 cm sp.). Erdoho1wi1i: PC {SGJ S Y ~I l3...wa especially rich in specimens from the Banal region and Gutiii Mts. (fu loppite was named in his honor)...detailed. unified mineralogical encyclopaedia of the region had been planned by the Commi!.sion on Mineralogy |
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| QUARTZ FAMILY MINERALS Section of polished agate, showing natural color at the lower end, and on...fund of information on the subject of agates, chalcedony, and petrified woods, and these chapters were...Chapter uartz xiii . . . 13o Contents Agate —Chalcedony Chapter X 157 Chapter XI Geodes and...Illustrations Section of Polished Agate (Frontispiece) iv Axhead Fashioned from Agate 14 Representative Minerals...Crystals Arrowheads of Common 119 Opal and Agate Display of Quartz Minerals Jasper Jasper 130 |
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| ................................ 32 Marble Bar region ........................................................................................ 36 Cue region ..................................................................................... 36 Yalgoo region .................................................................................... 40 Menzies region ................................................................................. 40 Coolgardie region .............................................. |
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| Ceriopyrochlore Cerite Cerussite Chabazite-(Ca) Chalcedony Chalcocite Chalcomenite Chalcophanite Chalcopyrite...Zr)(Si2O7)2OF3 Hg2I2 Ag2Hg3 Pb (Zn,Cu)(OH)(VO4) chrom chalcedony Na3Ti3.6 Nb0.4(Si2O7)2O4·4(H2O) KAl2(Si3Al)O10(OH...the Alpine region, and (3) Mid-Triassic to early Jurassic extension in the extra-Alpine region. Isotope...make a contribution to the cultural heritage of a region and may successfully be used in exploration (Mascaro...two years. The economic potential of a particular region or mining camp can be deduced from the economic |
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| Ceriopyrochlore Cerite Cerussite Chabazite-(Ca) Chalcedony Chalcocite Chalcomenite Chalcophanite Chalcopyrite...Zr)(Si2O7)2OF3 Hg2I2 Ag2Hg3 Pb (Zn,Cu)(OH)(VO4) chrom chalcedony Na3Ti3.6 Nb0.4(Si2O7)2O4·4(H2O) KAl2(Si3Al)O10(OH...the Alpine region, and (3) Mid-Triassic to early Jurassic extension in the extra-Alpine region. Isotope...make a contribution to the cultural heritage of a region and may successfully be used in exploration (Mascaro...two years. The economic potential of a particular region or mining camp can be deduced from the economic |
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| this layer indicate that this is an example of chalcedony. Quartz crystals are visible to the naked eye...Archaeologists are more familiar with quartz and chalcedony varieties as these stones were commonly used...vague term ‘prase’ instead of translucent green chalcedony or green jasper. Mineralogically, however, these...the differentiation between onyx, sardonyx and agate. This issue has been addressed in the past by researchers...which are only visible under magnification i.e. chalcedony and jasper) (Pl. 2) and macrocrystalline (quartz |
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| the earlier history, indeed the prehistory, of a region. Conglomerates speak of a time when high nearby...prismatic. Fracture: shell-like, uneven to poor. CHALCEDONY Luster: waxy. Hardness: 7. Cleavage: none. Fracture:...perfect cubic. shell-like, brittle. Fracture: CHALCEDONY Luster: waxy. Hardness: Cleavage: GYPSUM ... ZA aX Description of Minerals Actinolite Occurrence: Occurs generally in crystalline schists and...Remarks: A common rock-forming mineral. Albite Occurrence: Occurs in small crystals or, more often |
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| __________________________ 288 Lab Notes A new chalcedony treatment • DiamondView indicates treatment in...strong indicator of HPHT treatment. Concerning the occurrence of the “cage” effect in natural (untreated) diamonds...Kashmir (in what is now the Indian part of the region) in 1881 after a landslide revealed the blue gems...(Atkinson and Kothavala, 1983). Although the Kashmir district has been at the center of a hostile border dispute...remoteness of the deposit and military activity in the region. Myanmar. Burma (known as Myanmar since 1989) has |
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| and current status of the world’s only known occurrence of gem-quality red beryl. pg. 299 REGULAR FEATURES..._____________________ 314 Lab Notes • Chrysocolla “owl” agate • Red coral • Coated diamonds • Natural emerald...presents an update on the only known commercial occurrence of gem-quality red beryl in the world: the Ruby...temperature conditions initially in the graphite-stable region (similar to those commonly used in HPHT treatment;...temperature and pressure in the “diamond-stable region,” there was still no improvement in its color (figure |
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| its place of formation. A few minerals, such as chalcedony, have a special crystalline structure that does...because they con- Figure 4. Chalcedony from the Faeroe Islands. Chalcedony is not crystalline in the normal...fine-grained mass. The rock illustrated is from a region near Oslo, Norway. Samples of it were brought to...first described) or after a landscape, county, or region in which the type locality was situated. Aragonite...from St. Anthony Mine, Mammoth-Tiger 10x 18mm. District, Pinal County, Arizona, USA. Field of view: 33 |
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| from Madagascar|Aquamarine from Pakistan|Chrome chalcedony from Tanzania| Yellow dravite from Tanzania|New...include the following fields: author, title, source, region and keywords. In addition, Sheahan’s diamond reference...found in the southern mountains of the Negev Desert region near Eilat, Israel. This area is known to be rich...Darren mine located near Ambilobé in the Vohemar District of northern Madagascar. This supplier stated that...minerals in alpine clefts of the Vohemar-Ambilobé region. The apatite cabochon was examined by one of the |
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| Zircon Xenotime Melilite group Si02 group Quartz Chalcedony Tridymite Chabazite Minerals with uniaxial negative...Actinolite Anorthite Apatite Biotite Calcite Chalcedony Chlorite Clinopyroxene Cordierite Epidote Volcanic...skeletal forms and/or is altered to leucoxene. Occurrence: accessory mineral in most igneous rocks. It...clearly seen in altered than in fresh grains. Occurrence: it occurs together with magnetite as an accessory...very characteristic and different paragenesis. Occurrence: as a secondary mineral in igneous rocks (Fig |
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| any of the actual or potential conflicts in the region—not in Iraq, not between Israel and her neighbors... For too long, the prevailing mentality in the region has been that the weak cannot afford to give up...battle between good and evil will take place in that region. This isn’t a point I am inclined to argue, but...require that the forces of moderation throughout the region do more to support each other, so that extremists...mastering the market. Looked at The New York diamond district has long been the center of diamond distribution |
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| .......................................... The region of nearly stagnant waters........................the copper minerals.......................... Occurrence of the copper minerals.........................the silver minerals.......................... Occurrence of the silver minerals.........................compounds...................................... 135 Occurrence of the lead minerals...........................compounds...................................... 140 Occurrence of the zinc minerals........................ |
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| THE COPPER DEPOSITS OF THE CLIFTON-MORENCI DISTRICT, ARIZONA BY w-ALDEMAR LINDGREN WASHINGTON GOVERNMENT.... . . . . . . . . . . . . . . . . . . . . 56 Occurrence and distribution . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . . . . . . . Chalcedony................................................................... __ •. _ 303 IX. METCALF DISTRICT - - - - --.- - - - - -- - - - - •. -.---- •• -...323 323 324 11 CONTENTS. CHAPTER IX. METCALF DISTRICT-Continued. Ore deposits-Continued. Shannon mine-Continued |
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| Nome and Norton Bay regions 3 30 Copper River district 3 30 Logarithm tables 3 Regulations 30 3 Instructions...report on the lead and zinc deposits of the Ozark region, by H. F. Bain, with an introduction by C. R. Van...xxvi-xli. Geology and ore deposits of Elkhorn mining district, Jefferson County, Mont., by W. H. Weed, with...Price, 85 cents. XLIII. The Mesabi iron-bearing district of Minnesota, by C. K. Leith. 1903. 316 pp., 33...pls. Price, $1. XLV. The Vermilion iron-bearing district of Minnesota, with atlas, by J. M. Clements. 1903 |
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| Mapping of Levoberezhnoye Au Deposit (Khabarovsk Region, Russia) . . . . . . . . I. Anisimov, A. Sagitova...Tin Minerals at Pravourmiysky Deposit (Khabarovsk Region) . . . . . . . . . . . . . . . . . . T. Chikisheva...Ag-Bearing Mineralization of Nevenrekan Deposit (Magadan Region, Russia) . . . . . . . . . . . . . . . . . . ....other VMS deposits occur in north eastern Pontide region, Kuroko deposits of Japan and also comparable modern...massive sulphide deposits in the eastern black sea region (NE Turkey). Bull MTA 147:73–89 Yigit O (2005) |
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| Digest of decisions concerning water in the arid region.............. Special reports on Alaska .........etc. (published in 1899)....;.. Cape Nome Gold Region (published in 1900)................... Index to...viii-ix. The physical geology of the Grand Canon district, by Clarence E. Button, pp. 47-166, pis. x-xxxvi...of'the geology of the Comstock lode and the Wash oe district, by George F. Becker, pp. 291-330, pis. xlvi-xlvii...xviii-xxiii. Abstract of report on'geology of the Eureka district, Nevada, by Arnold Hague, pp. 237-290, pis. xxiv-xxv |
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| Tectosilicates Sílica group 261 261 261 Chalcedony 262 Tridymite 264 265 Cristo bali te 266 Opal...Fe-Ti oxides SEDIMENTARY ROCKS Clastic quartz chalcedony K-feldspar plagioclase clay calcite muscovite...dolomite gypsum anhydrite halite sylvite sulfur chalcedony clastic material (see also Table 10.2) Tactics...Extreme relief and birefringence and limited occurrence are characteristic. 119 120 INTRODUCTION...high temperatures to cure should be avoided. occuRRENCE: Found around fumaroles, volcanic vents, and |
Chalcedony occurrence, Zemplín, Trebišov District, Košice Region, Slovakia