 | | Journal (article/letter/editorial) | | hard as corundum, although it ranks gem are beauty, durability and rarity. Durjust above corundum in the...that a stone must have hardMr. Wiss discussed the corundum gems, ness—greater than six on Moh's scale—and...been estimated to be from 40 to 1200 times "Why New Jersey is a Happy Hunting 324 ROCKS A N D MINERAIS...comprehensive paper presented by Meredith Johnson, New Jersey State Geologist. Mr. Johnson reviewed the...varieties had been listed. He praised the display of New Jersey minerals in the Paterson Museum, and suggested |  | | Journal (article/letter/editorial) | | and Wales. BEVIEWS. I.-—GEOLOGICAL SURVEY OF ENGLAND AND WALES. THE GEOLOGY OF THE COUNTRY SOUTH AND...R. G. McConnell describes his exploration of the new goldfield of the Kluane district, Yukon. This embraces...worked by more economical methods there seems promise of future success. Mr. Joseph Keele examined the...Winisk River and surrounding country, lying to the south of Hudson Bay proper. His work adds materially to...geology of the typical Huronian area in the Bruce Mines district of Algoma. A map illustrating the geology |  | | Journal (issue) | | Volume 26 No. 1 EDITORIAL The 1980s in Review: New Realities of the Gem and Jewelry Industry Richard...Synthetic Gem Materials in the 1980s Kurt Nassau New Technologies of the 1980s: Their Impact in Gemology...purple-pink diamond, Argyle diamond m i n e , Western Australia; (19) 5.05-ct D-color, internally flawless diamond...courtesy o f Ronny Levy G e m Co.: 17 is courtesy of Evan Caplan a) Co.; 18 is courtesy o f Argyle Diamond...and not of the publishers The 1980s in Review: New Realities of the Gem and Jewelry Industry n the gem |  | | Journal (volume) | | MANUFACTURED THE CrUTTA PEBCHA & RUBBER BY.. MFCr. CO. OF TORONTO, Limited LIDGERWOOD ENGINES SPECIALLY...SPECIALLY BUILT TO MEET THE VARIOUS REQUIREMENTS IN MINES AND QUARRIES FOR HOISTING OR WINDING AND ALSO ...MANUFACTURED IN CANADA BY THE JAMES COOPER MANFG. CO. 299 St. Branches- HALIFAX, 124 Hollis St. James...PORTAGE, c/o Limited MONTREAL. Diamond Drill Co. ROSSLAND, P.O. Building. FRIED. KRUPP GRUSONWERK...Dressing Ores at the Works. For Canada: JAS. W. PYKE & Co., Merchants Bank Building, MONTREAL. For the United |  | | Journal (article/letter/editorial) | | analyses. This done, they should meet and prepare CORUNDUM IN PENNSYLVANIA. and proper for people to travel...other. Such testi. he had inspected a deposit of corundum recently discovered roads are exprese1y designed...the truth. of Unionville, Chester Co., Plio. The deposit promises to be The Professor gave quite an entertaining...handled with ever discovered. Detached crystals of corundum have often mpunit y if various conditions be complied...non-conductors might be interposed-a fe,ct which he the corundum in place, and for this purpose sunk a shaft run |  | | Journal (volume) | | metallurgical field, together with detailed accounts of new processes. Invaluable to the prospector, miner, merchant...The Engineering & Mining Journal 505 Pearl Street, New York 20 Bucklersbury, London, E. C. THE MINERAL...VOLUME XIV SUPPLEMENTING VOLUMES I TO XIII NEW YORK and LONDON ENGINEERING AND MINING JOURNAL (Incorporated)...L. S. Professor of Metallurgy, State School of Mines, Houghton, Mich. Progress in the Metallurgy of...Robert B. Professor of Mining, New Mexico State School of Mines, Socorro, New Mexico. Pyrites Mining and |  | | Journal (issue) | | h o m a s a n d Hing W a Lee I . . NOTES AND NEW TECHNIQUES 35 A Gemological Study of Turquoise...exchange to finance development projects and introduce new technology has generated significant interest among...the country's gem wealth. One consequence of this new interest in gems was the invitation extended to G...Award. This year's winning article was "A Proposed New Classification of Gem-Quality Garnets," written by...geology from the University of Witwatersrand in South Africa, and his Ph.D. in geology from Columbia University |  | | Journal (volume) | | Canadian Westing^house General Office and Works: Co., HAMILTON, ONT. For particulars address nearest...Chicago, U.S.A. CO. THE CANADIAN ii MlNlN(i IIEVJKW. Nova Scotia Steel and Coal Co. LIMITED. PROPRIETORS...PROPRIETORS, MINERS AND SHIPPERS OF Sydney Mines Bituminous Goal Unexcelled Fuel for Steamships and Locomotives...Steel, Iron, etc. : : : : COLLIERIES AT SYDNEY MINES, CAPE BRETON MANUFACTURERS OF HAMMERED AND ROLLED...CORRESPONDENCE SOLICITED. STEEL WORKS and Head Office: NEW GLASGOW, N.S THK CAXADIAX -MIXING REV1E:W. in |  | | Journal (issue) | | .......................................... 6 Australia ........................................................................................... 45 South Africa ........................................... USA/Belgium; Cody Opal, Australia ; Richard and Mary Lou Osmond, Australia; Able Lapidary, Hong Kong;...USA/ Madagascar; Pala International, USA; Sokolov Co., Russia; Sant Enterprises, Thailand; Facets Show...ASSOCIATION 19 West 21st Street, 7th Floor, Suite 705 New York, NY 10010-6805, USA tel: (212) 620-0900 fax: |  | | Journal (issue) | | Diamond Crystal ................ 90 Chondrodite on New York Island .. 92 The Over-Montgomery Correspondence...The cop per mines at Tsumeb, the gem peg matites of Brazil, the copper and ura nium mines of Zaire, the...the silver mines of Mapimi, Mexico, to name just a few, were not actively exploited for specimens during...Boyce Thompson and His Time (1869-1930)," John Day, New York, 1935. 3. 4. 5. 6. 7. 8. 9. I 0. 11. 12...Hagedorn, p. 14. Hagedorn. p. 35. Hagedorn, p. 36. New York Times, July 4, 1930. Newspaper anicle entitled |  | | Book | | the phenomenon gems Diamond: king of gemstones Corundum: the colorful palette Ruby: divine crystal spark...gemstones would only be colorless chrysoberyl, corundum, and beryl). The color can, however, be attributable...(high pressure, medium to high temperatures); (corundum, €.g. ruby in gneiss, spinel, etc.) 12 Dull red...(peridot in lava, e.g., Hawaii), sapphires in Australia, Cambodia, Thailand, and Vietnam 14 Glowing red...the case of these metamorphic rocks, a completely new mineral developed from a group of them without the |  | | Journal (issue) | | Patchick EDITORIAL REVIEW BOARD Robert Crowningshield New York, IVY Alan T. Collins London, United Kingdom...there is a widely accepted procedure for naming a new mineral. The name proposed is either accepted or...scientist (e.g., lzornerupine); the chemistry of the new mineral (e.g., fluorite); the relationship of this...of a name for a new mineral that does not have any gem potential. However, if a new species or variety...measure of opportunity, either by control of the new source or by access to an important market segment |  | | Book (edition) | | I. The Diamond Chapter Cape II. ... 45—59 South-African or Diamonds III. Australian Diamonds...Chapter III. Chapter IV. Chapter V. Spinel Corundum Ruby ... Sapphire Chapter VI. Opal Chapter...impaired, the and wearer oxide composed is Corundum a of of iron. silica and (hydric-fluoride)... also their invaluable assistance. EDWIN 18, New A. and Diamond, weight, 86 carats. SECTION... only superficial, impossible dis- to and South-African from all Beryl have appears these localities; |  | | Journal (issue) | | FALL 1991 Volume 27 No. 3 1 T A B L New Sources Bring New Opportunities Alice S. Keller Rubies and...Koiv~il~i New Rubies from the Morogoro Area, Tanzania H. A. HLinni and I<. Schmetzer NOTES AND NEW TECHNIQUES...of R. Esmerian, Inc., New York. In recent years, rubies have emerged from new deposits in Tanzania and...CA; the 1.69-ct ruby is courtesy of Evan Caplan a ) Co., Los Angeles, CA; the remaining stones (0.32-0.50...of the necklace courtesy o f R. Esnienan, Inc., New York. Typesetting for Gems & Gemology is b y Scientific |  | | Journal (article/letter/editorial) | | This year's Festival promises to be one of the biggest Festivals yet, with new attractions such as the...expected to be much larger at the 1963 Festival, new and unusual exhibits with lectures and slides, "Katonga...section of the country from Canada to Colombia, South America and from Maine to California have been picked...mineral societies, schools and dealers. Each day promises excitement and interest to all. The field trips...trips are scheduled for each day to selected mines and other points of interest, with a competent guide |  | | Journal (article/letter/editorial) | | lhnestone with polished If for any reason the of New York, distinguished among his contemporaries surface...erals and fossils, exhibited a fine specimen of a new which h&.s recently been issued, is extremely interest... A. H. Ehrman. Among these was a representative New England community. fine microscopic specimen of beaumonite...specimens of corundum from North The report show!'! that there has been a decided im and South Carolina...is made that a larger pro ony and agates from South America formed the excel of the library. was |  | | Book | | British the of minerals and Mines Stokes G. S. Ralph ■■> - I # MINES AND MINERALS OF THE BRITISH... PJ(. J.;'. . PRIMITIVE CHINESE OFBN-CAST. MINES AND MINERALS OF THE BRITISH EMPIRE BEING A DESCRIPTION...a brief, though comprehensive, review of those mines and minerals of the British Empire oversea, the...Singapore ; and journals in India and Australia—a course was pursued from South Africa through Ceylon, India,... Burma, Malay Peninsula, Australia, New Zealand, and Canada. In the period mentioned, when the mineral |  | | Book | | But image forth the far-famed tales— But seem a new Arabian night. And when engirdled figures crave,...Auriferous Quariz Veins, General Character of .153 ••• Australia, Gold in ... 2, 5, 12, 35, 63 Auwardt, Mr. . 70...India 1, 142 Copper .. 27, 31, 95 Cordiner .27 Corundum ... ... 30, 98, 123, 140 Cost of Crushing Quartz...gentleman formerly connected with Messrs. Delmege, Reid & Co., Galle, but now for several years engaged in mercantile...rivers in Ceylon very nearly resemble those of Australia —their beds, which are-nearly dry in the hot season |  | | Journal (volume) | | PERCHA & RUBBER MF&. CO. OF TORONTO, limited INGERSOLL-SERGEANT For.. Tunnels, Mines and Quarries. STRAIGHT...MAN'PG 299 ST. MANCH OFFICES: ROSSLAND, B.C. CO. Limited JAMES STREET, MONTREAL. RAT PORTAGE. ONT...W. PYKE & Co., Merchants Bank Building, MONTREAL, THOS. PROSSER & SON, 15 Gold Street, NEW YORK, Mexico...PABLO BERGNER, Apartado 54Q, MEXICO. South Africa: UNITED ENGINEERING CO., Ltd., P.O. 80x1082, JOHANNESBURG...also our new Catalog, write :— NEW AND SECOND HAND FOR RAILWAYS, TRAMWAYS, M. MITSHKUN CO. &c. DETROIT |  | | Book (edition) | | Inc., 3300 Clipper Mill Road, Baltimore rr, Md AUSTRALIA: Penguin Books Pty Ltd, 762 Whitehorse Road, Mitcham...Mitcham, Victoria First published April 1944 New Edition 1945 Revised and reprinted 1950 Reprinted 1953...Lees and Mr A. H. Taitt of the D’Arcy Exploration Co. We are also indebted to the following Publishers...for permission to reproduce figures: Methuen and Co. (Bagnold’s Physics of Blown Sand and Desert Dunes...ofStructural Geology for Fig. 37); McGraw-Hill Publishing Co. (Nettleton’s Geophysical Prospecting for Oil for |  | | Journal (issue) | | Stephen C. Hofer and D. Vincent Manson NOTES AND NEW TECHNIQUES 150 Revolution in Diamond Cutting: Laser...Crowningshield, of the GIA Gem Trade Laboratory in New York, for helpful discussions; and to Robert E. Kane...usually not specified. The reaction of synthetic corundum (Nassau, 1980a) to various types of heat treatment...can interact with the gemstone Heat treatment of corundum can affect the presence of milkiness and asterism...heated; considerable variation must be expected with corundum from different localities. Nine possible treatment |  | | Book (edition) | | by THE AMERICAN AND INSTITUTE METALLURGICAL New York 1949 OF MINING ENGINEERS Copynicur, 1949...Geological Survey, the U. S. Bureau of Mines, and the Canada Department of Mines and Resources have cooperated...desire to take advantage trained in these subjects. New York, N. Y. February 1, 1949 of the growing field...Lamar and J. S. Macuin Weir ia aD ye AD ELAING Co ROOK WOOD .... 448 tr 467 ase arte (en ic Sern...Abrasives Abrasives (above 7 in Mohs’ scale) Corundum H— 9 Intermediate Hardness (H—5.5 to 7) Silica |  | | Journal (issue) | | Family of Gem Carvers Akoya Cultured Pearls from Australia A Chart of Ruby Inclusions Winter 2017 VOLUME...423 Akoya Cultured Pearl Farming in Eastern Australia Laura M. Otter, Oluwatoosin B. A. Agbaje, Le Thi-Thu...shoreline of Australia using native Pinctada imbricata fucata mollusks. pg. 417 NOTES & NEW TECHNIQUES...Equall, and John L. Emmett Presents a group of corundum standards developed by GIA to improve the accuracy...• Fiftieth anniversary of tsavorite discovery • New azuritemalachite mixture from Peru • Type IIa diamonds |  | | Journal (issue) | | Gunawardene and Mahinda S. Rupasinghe NOTES AND NEW ' TECHNIQUES Some Unusual Sillimanite Cat's-Eyes...of the most productive, if little known, emerald mines in Colombia is the Coscuez mine. The 14.52-ct emeraldillustrated...Miranda EDITORIAL REVIEW BOARD Robert Crowningshield New York, NY Pete Dunn Washington, DC Dennis Foltz Santa...district, i n Boyacd, Colombia, contains several mines. Although the Muzo mine i s undoubtedly the best...Colombia's Muzo district actually encompasses several mines, of which two are currently major producers: Muzo |  | | Journal (article/letter/editorial) | | analyses. This done, they should meet and prepare CORUNDUM IN PENNSYLVANIA. and proper for people to travel...other. Such testi. he had inspected a deposit of corundum recently discovered roads are exprese1y designed...the truth. of Unionville, Chester Co., Plio. The deposit promises to be The Professor gave quite an entertaining...handled with ever discovered. Detached crystals of corundum have often mpunit y if various conditions be complied...non-conductors might be interposed-a fe,ct which he the corundum in place, and for this purpose sunk a shaft run |
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