 | | Report (issue) | | VIRGINIA DryISION OF MINERAL RESOURCES PUBLICATION 115 TANTALIAN AND NIOBIAN RESOURCES IN VIRGINIA William...and Palmer C. Sweet .:;: ."' COMMONWEALTH OF VIRGINIA DEPARTMENT OF MINES, MINERALS AND ENERGY DIVISION...State Geologist CHARLOTTES VILLE, VIRGIMA t99l VIRGINIA DTVISION OF MINERAL RESOURCES PUBLICATION 115...RESOURCES IN VIRGINIA William F. Giannini and Palmer C. Sweet COMMONVYEALTH OF VIRGINIA DEPARTMENT OF...VILLE, VIRGINIA r99r FRONT COVER: Columbite-tantalite crystal from Mitchell Mine, Bedford County, Virginia |  | | Journal (issue) | | Vol. 29 February 1983 No. 1 LARGE GEM TOPAZ CRYSTAL DISCOVERY Wm. F. Giannini and D. Allen Penick...Penick, Jr. A large topaz crystal was found in Virginia, Septen-kr 1 4 , 1982 (Figure 1) The crystal, believed...the largest gem crystal found i n North quality topaz Amrica, was discovered by veteran mineral collector...was found in the dump of the Herbb No. 2 mica mine in -tan County. The mine, located on the Fine Creek...northeast of F l a t Rock . and 0.38 mile along a woods road north of State Route 716 (Figure 2 ) . The 8.9-pound |  | | Journal (article/letter/editorial) | | VIRGINIA MINERAL LOCAL INDEX Although perhaps best known for its turquoise crystals, apophyllite on...kyanite, Virginia has, in fact, over 150 mineral species. and D. A L L E N P E N I C K , JR. Virginia Division...Mineral Resources P. O. Box 3667 Charlottesville, Virginia 22903 T H I S V I R G I N I A M I N E R A L L...world-wide locality index. The localities are listed by county, followed by a listing of the most prominent minerals...source of information in this Virginia index was Minerals of Virginia (1970) by R . V . Dietrich. A l |  | | Journal (issue) | | February 1987 No.1 VIRGINIA MINERAL LOCALITY INDEX D. Allen Penick, Jr. This Virginia mineral locality...world-wide locality index The localities are listed by county, followed by a listing of the most prominent minerals...source of information in this Virginia index was Minerals of Virginia (1970) by R. V. Dietrich. Although...famous localities in Virginia, such Updated from Rocks and Minerals, Vol. 60, No. 4, July-August, 1985...pegmatite in Amelia County and the Lynch Station locality (turquoise crystals) in Campbell County, are now closed |  | | Journal (article/letter/editorial) | | as arsenopyrite, wolframite-ferberite, apatite, topaz, or scheelite-are actively sought by collectors...Cassiterite crystallizes in the tetragonal system (4/m 2/m 2/m). When untwinned, the crystals are typically short...granite by late fluids producing a peculiar mica-rich rock called greisen; complex pegmatites; and rhyolitic...Historically, there have been numerous attempts to mine cassiterite within the United States, each ultimately...the Martin prospect and Bennett quarry in Oxford County. Good crystals up to 25 mm have been found with |  | | Report (issue) | | the cover—Turquois crystals from Lynch Station, Virginia; x ca.; pho tograph by Neal Ycdlin; color plates...C. A. Michael. COLD NUGGET FROM SPOTSYLVANIA COUNTY: Longest dimension approximately 13 cm., photograph...of Virginia R. V. DIETRICH* Professor of Geology and Associate Dean of Arts & Sciences, Virginia Polytechnic...Polytechnic Institute Research Division Bulletin 47 Virginia Polytechnic Institute, Blacksburg, Va. 24061 *... © R. V. Dietrich and the Research Division of Virginia Polytechnic Institute, 1970 Printed and bound |  | | Journal (article/letter/editorial) | | being one of the most locally abundant group of rock-forming minerals and certainly one of the most popular...translucent and has a vitreous to resinous luster. It has no cleavage but may exhibit parting on {110}. It is...can be contacted at the addresses above. 96*2: 405,9(3: tals appear to have been severely etched...is from Leiper’s quarry at Springfield, Delaware County, Pennsylvania (Peters 1984). When the spessartine...feldspar, and quartz in the former, and bixbyite, topaz, sanidine, and pseudobrookite in the latter. Because |  | | Journal (article/letter/editorial) | | TOPAZ A • MINERALOGICAL • REVIEW Downloaded by [New York University] at 21:04 11 May 2015 Coveted...specimens from the National Museum of Natural History TOPAZ IS THE STATE GEM of Texas and Utah; however, it...the "big three" (emerald, sapphire, and ruby), topaz is nevertheless regarded as an important and prized...attributes is that, unlike many other gem minerals, topaz may occur in crystals large enough to cut giant...giant gemstones. Gems such as the Champagne Topaz (36,853 carats), the American Golden (22,875 carats), and |  | | Report (issue) | | the area ________ ·_______________ ___ ______ _ Rock formations ________________________________ _ Metamorphic...Paragenesis ______________________________ ~ :. ___ _ 1 2 2 3 4 4 4 4 6 6 6 6 6 7 9 10 11 12 13 15 16 16..._ _ Miscellaneous zonal deposits ________ _ Burr-rock deposits ___________ - ___ --Fracture-filling and...____________________ - __ - - - - Mica in country rock _______________ _ Relative productivity of deposits...________________ _. __ - ___________ ----- 77 ~ Topaz .. -----"'--'-------------- ------- --- -------Vermiculite_ |  | | Journal (issue) | | R. Kampf Natural History Museum of Los Angeles County Arthur Roe Tucson, AZ Abraham Rosenzweig University...on request. Suggestions for authors See Vol. 12, no. 6, p. 399, or write for copy. Advertising Information...EDITOR LIGHT ISSUE Readers with a delicate touch will no doubt notice that this issue is a little lighter...extra financing for the Gold Issue). So there is no need to worry . . . it’s nothing permanent. In fact...are tax-deductible. Please write if you have items no longer needed. We can use, among other things, the |  | | Journal (article/letter/editorial) | | 09:35 10 October 2014 Helen Hunt Falls, El Paso County, Colorado O wing to its diverse paragenesis and...ultraviolet radiation. Zircon is tetragonal (4/m 2/m 2/m). It is most commonly seen in prismatic crystals... occurring with many desirable species such as topaz, beryl, and tourmaline. It is common in calc-alkaline...zircon crystals from Helen Hunt Falls, El Paso County, Colorado. Dave Bunk specimen, Jeff Scovil photo...Hunt Falls, El Paso County, Colorado. Dave Bunk specimen, John Smolski photo. Figure 2. Zircon crystal, |  | | Journal (issue) | | the Virginia Polytechnic Institute, Engineering Experiment Station Series, dealing with Virginia Mineral...Mineral Localities: Virginia Mineral Localities (1960 Edition) Virginia Mineral Localities (Supplement...(Supplement I) Virginia Mineral Localities (Supplement II) Virginia Minerals and Rocks (3rd Edition) Ex LIBRIS...LIBRIS ROCK H. CURRIER BOOK No. _'fl_9_ On the Co•er-Arboreacent cr7atal irroupa of cnlclto from ,avltlu... I !V I ii VIRGINIA POLYTECHNIC INSTITUTE Engineering Experiment Station Series No. 151 Ii !I ·1 |  | | Journal (issue) | | Jan/Feb 2024 Vol.99, No.1 ROCKS MINE ."Iii[! iil"J www.tandfonline.com/vram Pegmatite Minerals & Gems...I. Jacobson, Denver, CO Anthony R. Kampf, l.A. County Museum of Natural History, CA Virgil W. Lueth,...across a local area net\,vork. Subscription offices: USA/North America: Taylor & Francis Group, LLC, 530 Walnut...Taylor & Francis Group, LLC. All rights reserved. No part of this publication may be reproduced, stored...Copyright Clearance Center (www.copyright.com) in the USA or the Copyright Licensing Agency (www. cla.co.uk) |  | | Journal (article/letter/editorial) | | monazite, petalite, median and calcic plagioclase, topaz, triplite, and other species. tourmaline, triphylite-lithiophilite...interior parts of the body. They occur chiefly in rock with giant pegmatitic texture, which is characterized...of minerals in most massesof pegmatite makes this rock type a particularly inviting one for detailed examination...from a mass of pegmatite in northwestern Riverside county, california. He clearly recollects his chagrin...discovering, a few weeks later, that this was by no means the largest known crystal of feldspar! In the |  | | Journal (issue) | | TOPAZ, I J.INERALOGICAL RECORD JANUARY-FEBRUARY 1995 • VOLUME 26 NUMBER 1 • $10 Wayne & Dona Leicht........ 5 by M. A. Menzies Pink topaz from the Thomas Range, Juab County, U ta h ........................Lichte & P. H. Briggs FM-TGMS-MSA Symposium on topaz...................................................Columns Notes from the editor by W. E. Wilson TOPAZ, COVER: TOPAZ crystals to 4 cm, on matrix, from Ghundao...still reasonably priced, at $18 plus $1 postage ($2 foreign). We had originally planned to include type |  | | Book (edition) | | MARIN COUNTY FREE LIBRARY 3 1111 00289 4184 \ I s Fifth Revised Edition A complete, state-by-state...Easy-to-understand instructions for recognizing rock formations; glossary. How to identify gem minerals...is a precise explanation of h< to recognize the rock formation* which gems occur. The tabular Gem ... contents fun to hunt for gems 1. It's 2. How 3. Rock formations 4. How 5. Characteristics of...entertaining exercise search, and the thrill of discovery. No purchased stone can ever bring the pleasure that |  | | Book | | HfiRIN COUNTY FREE LIBRfiRY 311110G386652Q I V Russell P MacFal A COLOR TREASUF FOR COLLECTORS...it a veritable not just a picof informa- is mine tion, telling everything the collector needs to...color lilNLRALS 5^49 CENTRAL LIBRARY 1976 UJCl 2 OfC DEC 6 6 1978 1 FEB 198a 1977 1 1977 ...{jl IHL18m , OCT IMHJLZJMI 29 1997 AUli APR 2 1978 i: ftIV Ml !m DEC 1 ilAY 1 6 I97t» 6...1EE_ AUe 9 1 .JiJ JAN021 rtuo X ^ lyao JUN ML 2 APR 6 1330 APR G ; / 'M'o t(\/oU302m 5 N |  | | Journal (issue) | | 0022-1252 XIX (3) 213-292 (1984) JULY, 1984 Vol. XIX No.3 THE JOURNAL OF GEMMOLOG-Y and PROCEEDINGS OF...GEMMOLOGICAL ASSOCIATION OF GREAT BRITAIN Vol. XIX No. 3 JULY 1984 CHROME DIOPSIDE FROM U.S.S.R. By HANS-WERNER...synthetic flux crystals (see Figures 1 and 2). Diopside, CaMg(Si 2 0 6 ), is a member of the pyroxene group...crystalline solution of diopside—hedenbergite (CaFe(Si 2 0 6 ) caused by the diadochy of Mg and Fe2+. According...perceptible in thin sections, needs more than 3 % Cr 2 0 3 (Tröger et ai, 1971). The specimens under discussion | | | Book | | not just a picture book. Rather, it is a veritable mine of information, telling everything the collector...549 t!INERALS CE::!JTTIAL LIBHAHY p 111'6 lOCl 2 hl76 0E'C 1 6 1978 FEB 1 DE C 6 1977 JUN \ O 1977...4 ~I 1982 DATE DU E FE B 1 L .. 19ff DEC 1 2 199i • . JAN 02199 DEC 1 3 t9n JAN 1 t \978 1819t...AY 1 11..J \., -± - ,~~r, JUN 1 8 1991 . l 2 6 t978 AUG 9 1978 SEP 7 1978 • T 6 NOV 7 ,., ...Mineralogy. 2. Mineralogy-Collectors and collecting-U.S. I. MacFall, Russell P., ed II. Title QE363 2.G8313 |  | | Book (volume) | | the icefree fringes of Greenland; in fact, there is no state or province which does not boast at least one...59-13853 ISBN 0-442-07613-4 All rights reserved. No part of this work covered by the copyright hereon...information is published separately in Volume II. Virtually no repetition of information takes place inasmuch as... 5 = fii? i a j — » ya y _— ’* : i mine in. q)! Y eit iia -...: 7 ¢ z = NTs tbee _ = hee Dy iti iy 2 pee 4 Rae teed i a gui Om, Me wat ip! \? silty |  | | Book | | A. Jobbins Butterworth-Heinemann Gem Books Topaz m(JTTERWORTH EINEMANN Butterworth-Heinemann Ltd...Butterworth-Heinemann Ltd 1992 All rights reserved. No part of this publication may be reproduced in any...Library Cataloguing in Publication Data Hoover, D. B. Topaz. - (Butterworth-Heinemann Gem Books Series) I. Title...Profile xii 1 Topaz - Historical perspectives 1 Introduction 1 Etymology of topaz 1 Topaz in ancient times...times 3 Topaz in Roman times 8 The Dark Ages 12 The Middle Age~ - topaz changes colour The beginning of |  | | Book (edition) | | Page 1: MuscO\ite. 45 mm, Linopolis, Brazil, H Page 2: Vivianite, I 00 mm, Huanzala, Bolivia, H Page 3:...Linopolis, Brazil, H Page 13: Gold, 35 mm.Eagle's est Mine, California, G Publi!>hed by Grdllit.u.o. Stefanikova43...Mineralogical Tables" by Strunz and Nickel (2001). There is no problem with the validity of at least 95 % of minerals...occupancy. The Sb members of the tennantite group (2.G) will serve as a good example: tetrahedrite Cu...of the substituting component may represent only 1-2 weight% of the whole composition. Polytypes are, according |  | | Report (issue) | | Preparation and marketing----___--______-_-_-_--_---_ 1 2 2 3 4 4 4 6 6 7 8 11 12 12 15 16 16 17 17 22 24 26...109 ILLUSTRATIONS Page PLATE 1. 2. 3. 4. 5. 6. 7. 8. 9. FIGUKE 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12...15 19 20 23 24 24 26 29 32 III IV TABLES 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Theoretical composition...power-factor values for electrical-quality groups E-l, E-2, and E-3____-_-_---_-____--_-_-----___-__-__-__ Price...data for mica specimens, arranged by lot and by mine or prospect-_-___--_-___-_-.___---___-_____--_ Results |  | | Book (edition) | | Morocco; (center, left) wulfenite, San Francisco mine, Sonora, Mexico; (center) ameihyst, Veracruz, Mexico;...(center, right) topaz, Thomas Mountains, Utah; (lower /eft) rnodochrosite, N’Chwaning mine, South Africa;...Africa; (lower left, center) wulfenite, Red Cloud mine, Arizona; (lower right, center) mimetite, Tsiimehb...Lincoln. Encyclopedia of minerals Sagiiache County Pu blic Library Saguache , Colorado DEMCO For...» aie \ Encyclopedia of Minerals IN MEMORY OF 2. HELEN KEMPNER < i FROM ye = JOHN & ELAINE | | | Book (edition) | | Morocco; (center, left) wulfen ite San Francisco mine, Sonora, Mexico; (center) amethyst, Veracruz, Mexico;...center, right) topaz, Thomas Mountains, Utah; (lower le ft) rhodochrosite, N'Chwaning mine, Sou th A frica;...Willard Lincoln. Encyclopedia of minerals ~~cbe County Public Library Saguache, Colorado OEMCO For Refere...89-5633 ISBN 0-442- 27681 - 8 All rights reserved. No part of this work covered by the copyright hereon...Fifth Avenue New York, New York 10003 Chapman & Hall 2-6 Boundary Row London SEI 8HN, England Thomas Nelson |
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