 | | Journal (issue) | | Crimean Peninsula, a small region (about 27.000 km 2), comprises sedimentaiy rocks which greatly dominate...Specimens: KaradagMountainRange, CrimeanPeninsula. 2. KaragachRidge,westernpart of Karadag. Weatheringfigures...of short Kok-Kaya is about 29 km 2, including land - about 21 km 2 and waters of the Ridge run down...Kok'1ebelsettlement. The Poperechn} Black Sea - about S km 2. In 1922, academician Alexey Petrovich (Transverse)...Wclll)is situated at the southwestern slope (Figs. 2. 8-15). aged by the Karadag is panitioned by short |  | | Journal (issue) | | WINTER 2009 WINTER 2009 PAGES 235– 312 VOLUME 45 NO. 4 Ruby-Sapphire Review Nanocut Plasma-Etched Diamonds... TOKYO RTGG09 Winter 2009 ® 235 Volume 45, No. 4 LETTERS _________________ FEATURE ARTICLES __________________...TECHNIQUES ___________ pg. 267 271 Chrysoprase and Prase Opal from Haneti, Central Tanzania James E. Shigley...characteristics of Tanzanian chrysoprase and green prase opal are revealed. 280 Demantoid from Val Malenco...from India • Emerald mining techniques at the Kagem mine, Zambia • Yellow grossular from Tanzania • An unusual |  | | Book | | and Stamatios Xydous On the Color and Genesis of Prase (Green Quartz) and Amethyst from the Island of Serifos...refereed journals, is the co-author of 4 IMA-approved new mineral species, and has co-authored three books... and a Distinguished Visiting Professor at the China University of Mining and Technology. His research...on nontraditional critical element resources of China, intraplate basaltic volcanism, genesis of sapphires...Voudouris 1, *, Stefanos Karampelas 2 , Vasilios Melfos 3 and Ian Graham 4 1 2 3 4 * Faculty of Geology and |  | | Journal (issue) | | MINERA LOGICAL ALMANAC . VOLU lE 27, OBSERVE JSSUE 2. 2022 PubUshed with support: Lomonosov Moscow State...Observer. Mineralogical Almanac, volume 27, issue 2, 2022. Moscow: Mineral-Almanac Ltd. 80 pages, 203...ontogeny developed by Boris Z. Kantor together with a co-author from India Milind Kolhatkar, in a paper about...crystals. 6.5 x 5 cm. Indicolite Mine, Shabry talc-magnesite deposit, Central Urals, Russia. Specimen:...Photo: Michael B. Leybov. Title photo: Quartz-prase: cluster of equant crystals with rhombohedral termination |  | | Book | | 200 known here-holds the productive Mwadui diamond mine, known for Yeryfine, rare, pink diamonds. Emerald...Catalog Card number 91- 78322 ISBN 0-945005-08-3 No part of this book may be reproduced by any mechanical... Eastern. I. Title. QE392.5.A3.K4 1992 Eastern. 2. Mineralogy553.8 QBI91-2019 Published by Geoscience...8 The Capping Volcanics 10 Conclusion 11 Chapter 2. Diamond Deposits of Tanzania 15 Location 16 Geology...Uvite-Dravite Chrome Tourmaline 99 Chapter 8. Prase Opal from Haneti Hill, Tanzania 103 Location 104 |  | | Book | | Record. Inc. Tucson, Arizona All rights reserved. No part of this work may be copied, digitized, reproduced...earthy rosettes of tabular "illite" pseudocrystals to 2 cm which are pseudomorphs after bastnasite--see photo...Springfield show ( 1995: 582). Madawaska [Faraday] mine near Bow Lake, Hastings County. Some of the world's...property of, the old Madawaska uranium mine (called the Faraday mine before 1964). The mineral assemblage...rosettes of metallic black ilmenite exceptionally reach 2 cm (Horvath and Gault, 1990), and a beautiful specimen |  | | Book (edition) | | absorbent cotton in order to maintain its beauty? 2. What gemstone is so sensitive that it will change...Translated by Evelyne Stern FGA ~ ~ Sterling Publishing Co. Inc, New York 1111[1 Press Limited, London Published... © English-language edition: Sterling Publishing Co. Inc., New York 10016, and N.A.G. Press Ltd, London...Publications Ltd.), 1977 Library of Congress catalog card No.: 77-79503 Sterling: ISBN 0-8069-3088-8 Trade 3089-6...gem trade Optical properties 27 26 Co/or 27, co/or of streak 28, co/or change 28, refractive index 31 |  | | Journal (article/letter/editorial) | | small diggings in a wooded area near Jackson, Clarke Co., Ala., we have two fine quartz specimens that had...ancient prase mine that had been worked by the Indians many centuries ago. This ancient mine is now known...County, Arizona. From this old mine we have a number of gem quality prase specimens of various shades of...ph—phosphorescence "We have sent for and received prase samples from seven different sources but none has...anywhere as fine material as that from our Arizona deposit." ARKANSAS — R&M is indebted to W. C. Riddle, 2318 |  | | Report (issue) | | m^: OF THE f \ ^COLLEGE OP \ J BULLETIN No. 67 Minerals of California By ARTHUR S. EAKLE...This work was made possible at this date through the co-operation Arthur of Prof. S. Eakle, Ph.D., of...small diamonds as a constituent of these sands. 2. GRAPHITE— Plumbago— Black Native carbon, Lead....Perfect basal cleavage. Soft with greasy — Hrrl feel. 2; G = 2.2. Graphite is a common constituent of crystalline... gneisses or schist MINERALS OF CALIFORNIA. No extensive deposits of good qiialit}- 9 known |  | | Book (edition) | | questions: 1. What is the most desirable color of a ruby? 2. Which stone changes color in artificial light? 3...Aventurine Orthoclase 180 Labradorite 182 138 Prase 138 Blue Quartz 138 Guscy Cats Bye 140 Aventurine...polished it (compare also “Cullinan I.," page 94, No. 3). The large red stone above “Cullinan II." is...throughout the book, are explained: Gem/Gemstone There is no generally accepted definition for the term gem or...materials are of synthetic origin (e.g., YAG). There is no definite demarcation line, and woods, coal, bones |  | | Book (edition) | | questions: 1. What is the most desirable color of a ruby? 2. Which stone changes color in artificial light? 3...Third Edition Walter Schumann Sterling Publishing Co., Inc. Naw Coliass ela aie { > , Fah :F be ...polished it (compare also “Cullinan |.,” page 78, No. 3). The large red stone above “Cullinan II.” is...throughout the book, are explained: Gem/Gemstone There is no generally accepted definition for the term gem or...materials are of synthetic origin (e.g., YAG). There is no definite demarcation line, and woods, coal, bones |  | | Book (volume) | | Flint Ridge, between Newark (Licking Co.) and Zanesville (Muskingum Co.), a region of rolling, wooded hills...from outcrops, especially around McArthur, Vinton Co., for making the burstones they needed for grinding...Quarry 12 miles southeast of Toledo but in Ottawa Co. between Rtes. 51 and 579 yield good specimens of...COUNTY WILMINGTON, area of Todd’s Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships of...FALLS (on Geauga Co. line), area quarries⎯oilstone. DELAWARE COUNTY DELAWARE, area Co. exposures of blue |  | | Book (volume) | | Flint Ridge, between Newark (Licking Co.) and Zanesville (Muskingum Co.), a region of rolling, wooded hills...from outcrops, especially around McArthur, Vinton Co., for making the burstones they needed for grinding...Quarry 12 miles southeast of Toledo but in Ottawa Co. between Rtes. 51 and 579 yield good specimens of...COUNTY WILMINGTON, area of Todd’s Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships of...FALLS (on Geauga Co. line), area quarries⎯oilstone. DELAWARE COUNTY DELAWARE, area Co. exposures of blue |  | | Book (edition) | | BR BR QE392 .S54513 1997 // Sterling Publishing Co., Inc. New York 1 Contents Luster 41 Pleochroism...122 Peridot 158 Aventurine 122 Zoisite 160 Prase 122 Tanzanite 160 Blue Quartz 122 Thulite 160...Matrix 202 8 2 1 8 Rocks as Gemstones Onyx Marble 218 Tufa 218 Landscape Marble 2 1 Orbicular...polished it (compare also "Cullinan I.," page 78, No. 3). The large red stone above "Cullinan II." is...used throughout the book, are explained: There is no generally accepted definition for the term precious |  | | Journal (article/letter/editorial) | | GEOLOGICAL MAGAZINE VOL. LXXIX. No. i. JANUARY-FEBRUARY, 1942 The Tertiary Lavas of Rum By S. I. TOMKEIEFF... In the course of examination VOL. LXXIX. NO. I . I 2 S. I. Tomkeieff of the lavas of these isles...Harker for similar occurrences on the islands of the Inner Hebrides. The Tertiary Lavas of Rum TABLE I CHEMICAL...TRAOHYBASALTS i. SiO 2 TiO 2 A1 2 O, Fe 2 O 3 Cr 2 O 3 FeO MnO MgO BaO SrO CaO Na 2 O K2O Li 2 O P2O6 S . .... 5-26 5-21 2-10 0-30 0-08 -— 1-47 0-03 7-20 371 I33 tr. o-49 — 0-18 O-O2 tr. H 2 O+ . . — |  | | Journal (issue) | | XLVII SPRING 2011 SPRING 2011 PAGES 1– 78 VOLUME 47 NO. 1 p.BCr1 GIA G&G Spring ʻ11 Journal #20183-0 Madagascar...Madagascar Demantoid Andesine and Zircon from China Vietnamese Aquamarine Coloration of Saltwater Pearls...ʻ11 Journal #20183-0 Spring 2011 ® Volume 47, No. 1 EDITORIAL __________________ 1 The Dr. Edward...Article Award FEATURE ARTICLES __________________ 2 Carat Points 16 pg. 5 Demantoid and Topazolite...cultured pearls. 36 Brownish Red Zircon from Muling, China Tao Chen, Hao Ai, Mingxing Yang, Shu Zheng, and |  | | Journal (issue) | | GEMMOLOGICAL ASSOCIATION OF G R E A T B R I T A I N Vol. V No. 5 JANUARY 1956 DETAILS OF HARDNESS by W. F. EPPLER...method we find that by using a sclerometer (Fig. 2) this kind of hardness testing can be done accurately...can be exchanged for a diamond point. 244 Fig. 2 If we examine a scratch, or a groove made by scratching... which looks like an inverted cap. T h e n the inner mechanism is set in action by one of the two handles... Fig. 8 shows the indentation with a pressure of 2 kg. on syntheticspinel, which was improved in hardness |  | | Book | | Broadway, New York, N.Y. 10007 All rights reserved. No part of this publication may be reprinted, reproduced... Contents Preface 6 1. In the Beginning 7 2. What Gems Do You Hunt? 14 3. How Do You Find Gems...the first few millions of years of earth there were no other types. However, as the waves and the rain and...early sea creatures and all these formed a deep deposit on the floor of the sea. The enormous weight and...other processes. The obsidians are minerals that had no time to grow large crystals because they cooled almost |  | | Book (edition) | | Morocco; (center, left) wulfenite, San Francisco mine, Sonora, Mexico; (center) ameihyst, Veracruz, Mexico;...rnodochrosite, N’Chwaning mine, South Africa; (lower left, center) wulfenite, Red Cloud mine, Arizona; (lower...» aie \ Encyclopedia of Minerals IN MEMORY OF 2. HELEN KEMPNER < i FROM ye = JOHN & ELAINE...Number 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 SE! 8HN, England Thomas Nelson | | | Book (edition) | | Morocco; (center, left) wulfen ite San Francisco mine, Sonora, Mexico; (center) amethyst, Veracruz, Mexico;...Mountains, Utah; (lower le ft) rhodochrosite, N'Chwaning mine, Sou th A frica; {lower left, center) wulfenite...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...Library of Congress Cataloging-in-Publication Data 2 '19, t/ ~ Roberts, Willard Lincoln. Encyclopedia |  | | Book | | 106 109 no in m 113 114 Cat's-Eye 114 Crocidolite H5 Heliotrope Chrysoprase Prase Plasma ...To-day, this material is so plentiful that it is no longer classed for among the cameos and higher...are : 1 Isometric or Cubic having the axes equal. 2 Tetragonal or Pyramidal \ having only the 3 Hexagonal...the plates is turned at right angles to the other, no light, or but very little, is transmitted, so...Shades Amazon of Green. stone, tur- quois, prase, beryl, bloodstone, epidote, emerald, malachite |  | | Book (edition) | | photograph their specimens for this book. Front co,·er photos: Turquoise, polished. 55 mm, ZhiJandy...Capillitas, Argentina, H Back cO\·erphoto: Wolframite. 45 mm. Yaogangxian, China, H Page 1: MuscO\ite. 45...45 mm, Linopolis, Brazil, H Page 2: Vivianite, I 00 mm, Huanzala, Bolivia, H Page 3: Liddicoatite, polished...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 |  | | Book (volume) | | Braeriach, banded Sgurr lavender, banded with Prase. ; - Mor, purple. Ladder road and west side...MACMILLAN AND BOWKS. JAMES MACLEHOSE AND SONS. CO., LIM. THE MINERALOGY OF SCOTLAND BY THE LATE...Rights Reserved] V. I EARTH SCIENCES M8KARY Co CLEMENTINA C. S. THOMS (NEE HEDDLE), OLDEST...health finally gave way and he foresaw that he could no longer hope to see the book completed in his own...and it was, possibly, for that reason, that he left no clue to either the meaning of his symbols or the |  | | Journal (issue) | | Mineralogical Record MARCH–APRIL 2022 • VOLUME 53 • NUMBER 2 • $30 Wayne & Dona Leicht KRISTALLE Est.1971 ...Magazine for Mineral Collectors VOLUME 53 • NUMBER 2 Publisher & Editor-in-Chief Wendell E. Wilson minrecord@comcast...Wilson The Hallelujah Junction scepter quartz deposit, Petersen Mountain, Nevada ........................263 by C. J. Stefano Giroux Point, the Bagdad mine, Yavapai County, Arizona .........................29.7 cm, from the Hallelujah Junction scepter deposit, Nevada (see article in this issue). Fine Minerals |  | | Book | | Sydney Toronto Wellington All rights reserved. No part of this publication may be reproduced or transmitted...price list. First published 1986 © Butterworth& Co (Publishers)Ltd. 1986 BritishLibraryCataloguingin...Department Printed in Great Britain by the Garden City Pres~ Ltd .. Letchworth. Hert~ Preface When it...larger book, Emerald and Other Beryls (Chilton Book Co, 1981) to provide a condensed version emphasizing...Company of Radnor, Pennsylvania without whose help and co-operation this book could not have been published |
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