Lost Wax and Sand Mould Casting
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Download PDF About Minerals Sorted by Mineral Name
MINERALS SORTED BY NAME Here is an alphabetical list of minerals discussed on this site. More information on and photographs of these minerals in Kentucky is available in the book “Rocks and Minerals of Kentucky” (Anderson, 1994). APATITE Crystal system: hexagonal. Fracture: conchoidal. Color: red, brown, white. Hardness: 5.0. Luster: opaque or semitransparent. Specific gravity: 3.1. Apatite, also called cellophane, occurs in peridotites in eastern and western Kentucky. A microcrystalline variety of collophane found in northern Woodford County is dark reddish brown, porous, and occurs in phosphatic beds, lenses, and nodules in the Tanglewood Member of the Lexington Limestone. Some fossils in the Tanglewood Member are coated with phosphate. Beds are generally very thin, but occasionally several feet thick. The Woodford County phosphate beds were mined during the early 1900s near Wallace, Ky. BARITE Crystal system: orthorhombic. Cleavage: often in groups of platy or tabular crystals. Color: usually white, but may be light shades of blue, brown, yellow, or red. Hardness: 3.0 to 3.5. Streak: white. Luster: vitreous to pearly. Specific gravity: 4.5. Tenacity: brittle. Uses: in heavy muds in oil-well drilling, to increase brilliance in the glass-making industry, as filler for paper, cosmetics, textiles, linoleum, rubber goods, paints. Barite generally occurs in a white massive variety (often appearing earthy when weathered), although some clear to bluish, bladed barite crystals have been observed in several vein deposits in central Kentucky, and commonly occurs as a solid solution series with celestite where barium and strontium can substitute for each other. Various nodular zones have been observed in Silurian–Devonian rocks in east-central Kentucky. -
Deification in the Early Century
chapter 1 Deification in the early century ‘Interesting, dignified, and impressive’1 Public monuments were scarce in Ireland at the begin- in 7 at the expense of Dublin Corporation, was ning of the nineteenth century and were largely con- carefully positioned on a high pedestal facing the seat fined to Dublin, which boasted several monumental of power in Dublin Castle, and in close proximity, but statues of English rulers, modelled in a weighty and with its back to the seat of learning in Trinity College. pompous late Baroque style. Cork had an equestrian A second equestrian statue, a portrait of George I by statue of George II, by John van Nost, the younger (fig. John van Nost, the elder (d.), was originally placed ), positioned originally on Tuckey’s Bridge and subse- on Essex Bridge (now Capel Street Bridge) in . It quently moved to the South Mall in .2 Somewhat was removed in , and was re-erected at the end of more unusually, Birr, in County Offaly, featured a sig- the century, in ,8 in the gardens of the Mansion nificant commemoration of Prince William Augustus, House, facing out over railings towards Dawson Street. Duke of Cumberland (–) (fig. ). Otherwise The pedestal carried the inscription: ‘Be it remembered known as the Butcher of Culloden,3 he was com- that, at the time when rebellion and disloyalty were the memorated by a portrait statue surmounting a Doric characteristics of the day, the loyal Corporation of the column, erected in Emmet Square (formerly Cumber- City of Dublin re-elevated this statue of the illustrious land Square) in .4 The statue was the work of House of Hanover’.9 A third equestrian statue, com- English sculptors Henry Cheere (–) and his memorating George II, executed by the younger John brother John (d.). -
Lts Ficez 5Coz7'a1ra
ltS FicEz 5coZ7'a1ra he most valuable gem- Gem-quality red beryl on quality red beryl comes white devitri- from thc Wah Wah fied rhyolite Mountains of south- matrix. This western Utah (Fig. 1). sample mea- Red beryl occurs as a secondary sures 9 x 26 mm (O.35 x 1 mineral in topaz rhyolite. Market- in.l. (Photo by able crystals from the Wah Wah Sky Hall.) Mountains have been produced from the Violet Mine, operated on a limited scale since 1976 under the ownership of the Harris family of Delta, UT. From 1989 to 1995. oroduction from the mine amounted to more than $3 million with an inventory of several million dollars of unsold gems (Harris, 1995). In 7994, Kennecott Exploration leased the mine and surrounding claims to de- termine reserves and feasibility of gem recovery. Mining and explora- E.H. Christiansen and tion activity are continuing. J.D. Keith are proles- Previous work on red beryl has s0rs arld T.J. dealt mainly with crystallographic, Thompson is a student, chemical and optical properties of the crystals (Shigley and Foord, Ieparlment of Geohgy, 1984) with only general descriptions Brigham Yrung Univer- of the geology (Ream, 1979). How- sitt Brx 251 I l, Prlvn, ever. the conditions needed for for- mation of red beryl have not been UT 84fi[2 well constrained. It is generally pro- posed that beryl originates by pre- cipitation in fractures and vugs from high-temperature silica rhyolite and andesitic lava flows. gases as they are released from slowly cooled rhyolite Beginning about 23 Ma, the style and composition of lava. -
Compilation of Reported Sapphire Occurrences in Montana
Report of Investigation 23 Compilation of Reported Sapphire Occurrences in Montana Richard B. Berg 2015 Cover photo by Richard Berg. Sapphires (very pale green and colorless) concentrated by panning. The small red grains are garnets, commonly found with sapphires in western Montana, and the black sand is mainly magnetite. Compilation of Reported Sapphire Occurrences, RI 23 Compilation of Reported Sapphire Occurrences in Montana Richard B. Berg Montana Bureau of Mines and Geology MBMG Report of Investigation 23 2015 i Compilation of Reported Sapphire Occurrences, RI 23 TABLE OF CONTENTS Introduction ............................................................................................................................1 Descriptions of Occurrences ..................................................................................................7 Selected Bibliography of Articles on Montana Sapphires ................................................... 75 General Montana ............................................................................................................75 Yogo ................................................................................................................................ 75 Southwestern Montana Alluvial Deposits........................................................................ 76 Specifi cally Rock Creek sapphire district ........................................................................ 76 Specifi cally Dry Cottonwood Creek deposit and the Butte area .................................... -
Formation of Jarosite Minerals in the Presence of Seed Material H
46th Lunar and Planetary Science Conference (2015) 1825.pdf FORMATION OF JAROSITE MINERALS IN THE PRESENCE OF SEED MATERIAL H. E. A. Brand1,2 N. V. Y. Scarlett2 and I. E. Grey2, 1Australian Synchrotron, 800 Blackburn Rd., Clayton South, VIC 3168, Australia. [email protected] 2CSIRO Mineral Resources, Box 312, Clayton, VIC 3187, Australia. Introduction: There has been a resurgence in interest Experimental method: Jarosite forms readily by co- in jarosite, (K,Na)Fe3(SO4)2(OH)6, and related precitation on gentle warming of an appropriate minerals since their detection on Mars by the MER solution. 2.25 g of Fe2(SO4)3.xH2O and 0.70 g of rover Opportunity [1]. In this context, the presence of K2SO4 were dissolved in 10 mls of deionized H2O. jarosite has been recognised as a likely indicator of Seed materials were diamond, hematite and goethite. water at the surface of Mars in the past and it is hoped Hematite and goethite are commonly found in that study of their formation mechanisms will provide association with natural jarosite deposits. The inclusion insight into the environmental history of Mars [2]. of diamond provides a baseline for the effect of an inert Jarosites are also of great importance to a range of seed material. These materials were added to the mineral processing and research applications. For jarosite starting-solutions to give 5 wt% seed. An example: they are used in the removal of iron species additional solution was prepared with no seed material from smelting processes; they form detrimentally in to provide a comparison set of data. -
Wetenschap En Samenleving 125 Jaar VU
VU Research Portal Wetenschap en samenleving. Groei en ontwikkeling van de VU-familie in beeld Tervoort, A.L. 2005 document version Publisher's PDF, also known as Version of record Link to publication in VU Research Portal citation for published version (APA) Tervoort, A. L. (2005). Wetenschap en samenleving. Groei en ontwikkeling van de VU-familie in beeld. Dienst Communicatie Vrije Universiteit. General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. E-mail address: [email protected] Download date: 27. Sep. 2021 Wetenschap en samenleving Groei en ontwikkeling van de VU-familie in beeld Dr. Ad Tervoort Met medewerking van: Marijke Völlmar Dr. Paul Schneiders Prof. dr. D.Th. Kuiper Colofon Wetenschap en samenleving. Groei en ontwikkeling van de VU-familie in beeld is een uitgave van de Dienst Communicatie van de Vrije Universiteit. Deze uitgave werd mogelijk gemaakt door de Vereniging VU-Windesheim en wordt haar leden en de leden van universitaire gemeenschap aangeboden ter gelegenheid van het vijfentwintigste lustrum van de Vrije Universiteit. -
INCLUSIONS in AQUAMARINE from AMBATOFOTSIKELY, MADAGASCAR Fabrice Danet, Marie Schoor, Jean-Claude Boulliard, Daniel R
NEW Danet G&G Fall 2012_Layout 1 9/27/12 11:31 AM Page 205 RAPID COMMUNICATIONS INCLUSIONS IN AQUAMARINE FROM AMBATOFOTSIKELY, MADAGASCAR Fabrice Danet, Marie Schoor, Jean-Claude Boulliard, Daniel R. Neuville, Olivier Beyssac, and Vincent Bourgoin grams of translucent to transparent beryl were pro- duced, as well as several tonnes of opaque material In January 2012, aquamarine crystals containing for industrial use. While only a very small percentage interesting inclusions were extracted from the Am- was suitable for faceting, several hundred aqua- batofotsikely area northwest of Antsirabe, Mada- marines in the 1–35 ct range have been cut. In April gascar. These specimens displayed various types 2012, one of the authors (FD) traveled to the locality of eye-visible and microscopic inclusions, and and obtained representative samples. some had an unusual form. Raman microspec- troscopy identified reddish brown plate lets as Location and Geologic Setting. The workings are lo- hematite, while ilmenite was found as black cated less than 1 km north of Ambatofotsikely (a village platelets, black needles, and distinctive dark gray now locally known as Ambatofotsy Carole), 22 km dendrites. Similar inclusions are known in beryl north-northwest of Ankazomiriotra, and 74 km north- from Brazil, India, Mozambique, and Sri Lanka. west of Antsirabe. The deposit is centered at coordinates 19°27.662¢S, 46°27.450¢E, at an elevation of 1,010 m. The site is accessed by a paved road (RN 34) from ining activity near the central Malagasy village Antsirabe to a point 16 km west of Ankazomiriotra. of Ambatofotsikely was first documented nearly From there, a trail extends 15 km to Ambatofotsikely. -
Sapphire from Australia
SAPPHIRES FROM AUSTRALIA By Terrence Coldham During the last 20 years, Australia has ew people realize that Australia is one of the major assumed a major role in the production of F producers of sapphire on the world market today. Yet a blue sapphire. Most of the gem material fine blue Australian sapphire (figure 1)competes favorably comes from alluvial deposits in the Anal<ie with blue sapphire from noted localities such as Sri Lanka, (central Queensland) and New England (northern New South Wales) fields. Mining and virtually all other hues associated with sapphire can be techniques range from hand sieving to found in the Australian fields (figure 2). In fact, in the highly mechanized operations. The rough is author's experience it is probable that 50% by weight of usually sorted at the mine offices and sold the sapphire sold through Thailand, usually represented directly to Thai buyers in the fields. The as originating in Southeast Asia, were actually mined in iron-rich Australian sapphires are predom- Australia. inantly blue (90%),with some yellow, some In spite of the role that Australian sapphire plays in the green, and a very few parti-colored stones. world gem market, surprisingly little has been written The rough stones are commonly heat about this indigenous gem. This article seeks both to de- treated in Thailand to remove the silk. scribe the Australian material and its geologic origins and Whileproduction has been down duringthe to introduce the reader to the techniques used to mine the last two years because of depressed prices combined with higher costs, prospects for material, to heat treat it prior to distribution, and to the future are good. -
Mineralogy of Non-Silicified Fossil Wood
Article Mineralogy of Non-Silicified Fossil Wood George E. Mustoe Geology Department, Western Washington University, Bellingham, WA 98225, USA; [email protected]; Tel: +1-360-650-3582 Received: 21 December 2017; Accepted: 27 February 2018; Published: 3 March 2018 Abstract: The best-known and most-studied petrified wood specimens are those that are mineralized with polymorphs of silica: opal-A, opal-C, chalcedony, and quartz. Less familiar are fossil woods preserved with non-silica minerals. This report reviews discoveries of woods mineralized with calcium carbonate, calcium phosphate, various iron and copper minerals, manganese oxide, fluorite, barite, natrolite, and smectite clay. Regardless of composition, the processes of mineralization involve the same factors: availability of dissolved elements, pH, Eh, and burial temperature. Permeability of the wood and anatomical features also plays important roles in determining mineralization. When precipitation occurs in several episodes, fossil wood may have complex mineralogy. Keywords: fossil wood; mineralogy; paleobotany; permineralization 1. Introduction Non-silica minerals that cause wood petrifaction include calcite, apatite, iron pyrites, siderite, hematite, manganese oxide, various copper minerals, fluorite, barite, natrolite, and the chromium- rich smectite clay mineral, volkonskoite. This report provides a broad overview of woods fossilized with these minerals, describing specimens from world-wide locations comprising a diverse variety of mineral assemblages. Data from previously-undescribed fossil woods are also presented. The result is a paper that has a somewhat unconventional format, being a combination of literature review and original research. In an attempt for clarity, the information is organized based on mineral composition, rather than in the format of a hypothesis-driven research report. -
Copyright Statement
University of Plymouth PEARL https://pearl.plymouth.ac.uk 04 University of Plymouth Research Theses 01 Research Theses Main Collection 2017 Dogs and Domesticity Reading the Dog in Victorian British Visual Culture Robson, Amy http://hdl.handle.net/10026.1/10097 University of Plymouth All content in PEARL is protected by copyright law. Author manuscripts are made available in accordance with publisher policies. Please cite only the published version using the details provided on the item record or document. In the absence of an open licence (e.g. Creative Commons), permissions for further reuse of content should be sought from the publisher or author. Copyright Statement This copy of the thesis has been supplied on condition that anyone who consults it is understood to recognise that its copyright rests with its author and that no quotation from the thesis and no information derived from it may be published without the author’s prior consent. i ii Dogs and Domesticity Reading the Dog in Victorian British Visual Culture by Amy Robson A thesis submitted to Plymouth University in partial fulfilment for the degree of PhD Art History, 2017 Humanities and Performing Arts 2017 iii Acknowledgements I would like to express my deepest gratitude to my supervisors, Dr James Gregory and Dr Jenny Graham, for their ongoing support throughout this project. I would also like to extend immeasurable thanks to Dr Gemma Blackshaw, who was involved in the early and later stages of my research project. Each of these individuals brought with them insights, character, and wit which helped make the PhD process all the more enjoyable. -
The Memory of Slavery in Liverpool in Public Discourse from the Nineteenth Century to the Present Day
The Memory of Slavery in Liverpool in Public Discourse from the Nineteenth Century to the Present Day Jessica Moody PhD University of York Department of History April 2014 Abstract This thesis maps the public, collective memory of slavery in Liverpool from the beginning of the nineteenth century to the present day. Using a discourse-analytic approach, the study draws on a wide range of ‘source genres’ to interrogate processes of collective memory across written histories, guidebooks, commemorative occasions and anniversaries, newspapers, internet forums, black history organisations and events, tours, museums, galleries and the built environment. By drawing on a range of material across a longue durée, the study contributes to a more nuanced understanding of how this former ‘slaving capital of the world’ has remembered its exceptional involvement in transatlantic slavery across a two hundred year period. This thesis demonstrates how Liverpool’s memory of slavery has evolved through a chronological mapping (Chapter Two) which places memory in local, national and global context(s). The mapping of memory across source areas is reflected within the structure of the thesis, beginning with ‘Mapping the Discursive Terrain’ (Part One), which demonstrates the influence and intertextuality of identity narratives, anecdotes, metaphors and debates over time and genre; ‘Moments of Memory’ (Part Two), where public commemorative occasions, anniversaries and moments of ‘remembrance’ accentuate issues of ‘performing’ identity and the negotiation of a dissonant past; and ‘Sites of Memory’ (Part Three), where debate and discourse around particular places in Liverpool’s contested urban terrain have forged multiple lieux de memoire (sites of memory) through ‘myths’ of slave bodies and contestations over race and representation. -
Annual Report 2017−2018
ROYAL COLLECTION TRUST ANNUAL REPORT REPORT COLLECTION TRUST ANNUAL ROYAL 2017−2018 www.royalcollection.org.uk ANNUAL REPORT 2017−2018 ROYA L COLLECTION TRUST ANNUAL REPORT FOR THE YEAR ENDED 31 MARCH 2018 www.royalcollection.org.uk AIMS OF THE ROYAL COLLECTION TRUST In fulfilling The Trust’s objectives, the Trustees’ aims are to ensure that: ~ the Royal Collection (being the works of art ~ the Royal Collection is presented and held by The Queen in right of the Crown interpreted so as to enhance public and held in trust for her successors and for the appreciation and understanding; nation) is subject to proper custodial control and that the works of art remain available ~ access to the Royal Collection is broadened to future generations; and increased (subject to capacity constraints) to ensure that as many people as possible are ~ the Royal Collection is maintained and able to view the Collection; conserved to the highest possible standards and that visitors can view the Collection ~ appropriate acquisitions are made when in the best possible condition; resources become available, to enhance the Collection and displays of exhibits ~ as much of the Royal Collection as possible for the public. can be seen by members of the public; When reviewing future plans, the Trustees ensure that these aims continue to be met and are in line with the Charity Commission’s general guidance on public benefit. This Report looks at the achievements of the previous 12 months and considers the success of each key activity and how it has helped enhance the benefit to the nation.