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| © Tere crree! THE CLEVER GEM BUYER Sclaolalemcveliareln GAVIN LINSELL “She is more precious than...the main reason invariably is that a particular gem means something special to us: they represent a story...perceptions. Now in its second edition, The Clever Gem Buyer brings the reader not only the ‘gemmological’...in an absorbing and entertaining way, The Clever Gem Buyer’s second edition includes even more gemstone...mountain of gemstone rings’ in Thailand's Chanthaburi Province, an international centre for coloured gemstones |
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| 1 2 The Geological Sources of Gems Crystalline Gem Materials 3 40 Part II 3 4 5 6 7 8 9 10 11 12 13...The Biological Gem Materials The Fashioning of Gemstones Value-Enhanced Gemstones and Gem Materials 292...library for virtually all sources. Derivations of gem and mineral names are not given; they can be found...not now considered valid or current. While many gem collectors collect mineral specimens too, the text...text for the 1994 edition. In this new edition, the gem testing section has been omitted; this information |
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| GEMS Introduction 10 Gem descriptions is ORGANIC GEMS Introduction Z2i2 Gem descriptions 274 SYNTHETIC...SYNTHETIC AND ARTIFICIAL PRODUCTS Introduction 316 Gem descriptions 329 Synoptic Tables 366 Glossary...Probably the first question one tends to ask sbout a gem, as of a mineral, is ‘‘What is it?’’ Some look quite...including the use of a chemical hood and gloves. If a gem under examination is put, for example, into bottle...observations will be sufficient to identify the gem. Where a more precise figure is required, two pairs |
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| * * To my wife, who put up nobly with being a gem widow. A cknowledgements I am very grateful to the...Structure of Gemstones and their Imitations 35 The Gem Species 58 The Gemstone Industries 108 The Evolution...of these are capable of use as gems. While a few gem-forming minerals are relatively common, most are...annually. All this is, however, completely useless for gem pur¬ poses. The material is greyish and opaque; it...mined to win the gemstones. Even then most of the gem beryl will be wasted-either discarded as inferior |
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| determine the suitability of a stone for use as a gem are beauty or decorative value, rarity and durability...number of these so as to bring the terminology of the gem tr.a;der into line with that of the mine1~a1ogist...elaborate scientific instr11ments are often of use in gem determination. A small pocket refractometer with...X-rays and cathode rays in the determination of gem minerals, · especially for detecting doublets and...great variation in the weights used by different gem dealers.* Practically all countries have now agreed |
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| York To m y wife, who put up nobly with being a gem widow. A cknowledgements I am very grateful to the...Structure of Gemstones and their Imitations 35 The Gem Species 58 The Gemstone Industries 108 The Evolution...of these are capable of use as gems. While a few gem-forming minerals are relatively common, most are...annually. All this is, however, completely useless for gem purposes. The material is greyish and opaque; it...soil have to be mined to win the gem stones. Even then most of the gem beryl will be wasted - either discarded |
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| Community College Monroe, Michigan GEMS AND GEM MATERIALS Books by Epwarp H. Kraus with CHESTER...CHESTER KRAUS AND GEMS B. SLAWSON SLAWSON— AND GEM MATERIALS 332 pages, 6 X 9, 403 Illustrations with... India; 4, garnet (pyrope), Africa. GEMS AND GEM MATERIALS By EDWARD HENRY KRAUS Professor Emeritus...COLLEGE LI MONROE COUNTY CO Michigan GEMS Monroe, AND GEM MATERIALS Copryricut, 1925, 1931, 1939, 1941, 1947...decades the general public has become increasingly gem conscious. There has also been a distinct trend toward |
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| Taylor, Correspondence Course Diamond HANDBOOK OF GEM IDENTIFICATION 10th Edition Richard T. Liddicoat...may be encountered in English literature or in the gem, jewelry or art trades. BY ROBERT M. SHIPLEY ...Founder, Gemological Institute of America and American Gem Society ASSISTED BY The late ANNA McCONNELL BECKLEY...Edward H. Kraus, coauthor of Mineralogy and Gems & Gem Materials; Dr. G. F. Herbert Smith, author of Gemstones...developments have occurred in the production of synthetic gem materials. These and other pertinent data have been |
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| .......................... 114 A Compilation of Gem Names. By Gilbert Hart. ........................... By E. M. Bailey ...................... l21 The Gem Department. By Gilbert Hart........................internal construction being such as to enable the gem to break up white light into its constituent colors...polychromatic mosaic, so characteristic of this peerless gem. In the black opal shades of red and green predon1inate...along the eastern slopes of the mountains. The district is well timbered and watered and the numerous |
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| 7X IL GEMMOLOGY A STUDY OF THE IDENTIFICATION OF GEM-STONES, PEARLS, AND ORNAMENTAL MINERALS Fourth Edition...The Gemmologist’s Compendium. Essential methods of gem testing are explained concisely, the apparatus is...where possible, illustrated. A brief account of the gem species is given in semi-tabular form. Practical...must turn for assistance in the understanding of gem materials—and this combined knowledge forms the basis...the new science of gemmology. Since 90 per cent of gem materials are products of the mineral kingdom it |
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| bfr encountered in English literature or in the gem, jewelry or art trades. BY ROBERT M. SHIPLEY Founder...Founder, Gemological Institute of America and American Gem Society ASSISTED BY anna McConnell beckley Research...Kraus, co-author of MinV eralogy, and Gems and Gem Materials; G. F. Herbert Smith, author of Gemstones...especially distinctive from those of the entire gem mineral species under which the properties IX are...macroscopic inclusions in sagenitic quartz and other gem¬ stones. S.G. 3.0-3.2. R.I. 1.61/1.64. acute. Sharply |
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| sapphire, and one of the more recent additions to the gem world, kunzite—the colour, varies considerably in...found it in the native metal that occurred in his district. In parts of the world where gold was found in...profitably in quartz lodes or veins, or in the gravels or conglomerate (the well-known “ banket”’ of the...technique as occasion demanded. The identity of a gem is always of at least personal interest, but, so...diamond trade will be disrupted by the advent of gem material synthetically prepared. The colourless synthetic |
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| REFERENCE BOOK (1947) By Robert M. Shipley HANDBOOK OF GEM IDENTIFICATION (2nd Edition, 1948) By Richard T....preparation) By Dr. Sydney H. Ball PROPERTIES OF GEM VARIETIES OF MINERALS (posthumously 1948) Dr. Edward...may be encountered in English literature or in the gem, jewelry or art trades. BY ROBERT M. SHIPLEY ...Gemologicat Institute of America and American Gem Society ASSISTED BY ANNA McCONNELL BECKLEY Research...co-author of : ; ; M eralogy, and Gems and Gem Materials; G. F. Herbert Smith, author of Gemstones |
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| is otherwise the same as before. ¢ Chapters 20, “Gem Minerals,” has been retained from the prior edition...XII in the text, as well as individual gems and gem groupings. These images and all the black-and-white...Quartz 571 Rutile 20.GEM MINERALS Gem Minerals 555 Gem Qualifications 555 Types of Gem Cuts 556 The Early...Turquoise 561 Garnet 561 Zircon 562 Olivine 562 Gem Properties and Instruments for Their Determination...Gems 572 Spinel 572 Turquoise 572 Manufactured Gem Materials Without Natural Counterparts 572 Garnet |
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| the natural. This is particularly true of the gem minerals, for their synthetic counterparts rival...and by vapor deposition. Today, most important gem minerals and many common many bounded by crystal...plane-polarized microscope. Pleochroism and pink in the gem Opalescence. A is a common light as property...appropriately given to this phenomenon. cabochon gem angles to from closely packed minerals have a silky...increase in iron. In peridot, the of the magnesium of gem variety of olivine, iron substitutes for about |
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| 4813 Hollowbrook Fort Worth , TX 76103 The Leading GEM and MINERAL HOBBY Magazine P.O. Box 687. Mentone.... 67 4 - JULY 1975 PLEASURE FOR THE LAPIDARY GEM ROUGH FOR CUTTING BRAZILIAN AGATE - This agate Is...but we expect this to be one of the most popular gem rough materials we have ever offered. Therefore,...types of gem rough. Tax - Texans Include 5% state sales tax. Ask for our 1975 list of gem materials...and Show, " Montana's Treasure Chest." Bllllnga Gem end Mineral Club, host. Ramada Inn, Mullowney Lane |
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| used in gemology. It contains four color plates of gem min- sional and gems cut therefrom. The reason...gems, let if any, alone have a laboratory on gem materials. However, the student can read this chapter...Reading 509 468 13. Minerals As Gem Gem Minerals The Gem 510 510 Qualifications Types of ...Olivine 518 Gem Properties and Instruments for Their 518 Determination 524 Synthesis of Gem Materials 525...Rutile 528 Spinel 528 Turquoise 529 Manufactured Gem Materials Without Natural Counterparts 529 Garnet |
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| Gemmolo gist's Pocket Compendium. Essential methods of gem testmg are explained concisely, the apparatus is...introduction to the fascinating study of and to A gem species is given in semiGemmology has been kept within...must turn for assistance in the understanding of gem materials and this combined knowledge forms the basis...new science of gemology. — more than 90% of all gem materials are products of kingdom it is obvious that...gems and counterfeits, while the basic methods of gem discrimination, as used today, depend upon the work |
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| zoned single crystal of zircon (ZrSiO,) from Sri Lanka, photographed between crossed polarizers. The...used in gemology. It contains four color plates of gem minerals and gems cut therefrom. The reason for the...discussion of gems, let alone have a laboratory on gem materials. However, the student can read this chapter...543 600 Gem Properties and Instruments for Their Determination 601 548 550 Synthesis of Gem Materials...Reading 612 582 15. Gem Minerals 593 593 Gem Qualifications 594 Types of Gem Cuts 594 The Early |
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| discussion of gems, let alone have a laboratory on gem rnaterials. However, the student can read this chapter...Reading 592 15. Gem Minerals 593 Gem Minerals 593 Gem Qualifications 594 Types of Gem Cuts 594 The Early...Olivine 600 Gem Properties and Instruments for Their Determination 601 Synthesis of Gem Materials 606...Rutile 611 Spine! 611 Turquoise 611 Manufactured Gem Materials Without Natural Counterparts 611 Garnet...twin. This type of twin is especially common in gem spinel and hence is ca lled a spine/ twin. Figure |
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| f'ogg . 25. 495. and A.A. Hayes ( 1 846) Amer. J. Sri. ser. 2 , 1 . 122. show it to be chabazitc. Named...Alisonile. near Cu 6 PbS,. F. Field ( 1 859) A111a. J. Sri. 27. 387. (TL) Mina Grande. Coquimbo. Chile. Probably...Caillcre and S. Hcnin ( 1950) Compt. Rend. Arnd. Sri. Paris. 230. 668: S . Caillcre. A. Mathieu-S icaud...Fe3 • .Mg)iPO.) 3 • A . Damour ( 1 847) CR. Aca(/. Sri. Paris. 25, 670; ( 1 848) Ann. Mines. 13, 34 1 ....Em1ilova. and E.S. Rudnitsknyn ( 1968) 8111/. A rne/. Sri. URSS. no. 6. p. 29 [Amo1-1oxp113orn;rna ] . An nJuminian |
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| silicate groups. Chapter 13 is a brief introduction to gem minerals, and Chapter 14 provides three mineral identification...Phenacite Group 491 Olivine Group 492 Garnet Group Gem Properties and Instruments for Their 495 AlL,SiO;...Properties 572 Instruments for Studying Gems Synthesis of Gem Materials 578 Verneuil Process 578 Czochralski Process...Quartz 581 Rutile y 564 Gem Minerals 564 Gem Qualifications 565 Types of Gem Cuts 565 The Early Uses...580 582 Spinel 582 Turquoise 582 Manufactured Gem Materials Without Natural Counterparts 582 Garnet |
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| be cut and fashioned as gems are referred to as ‘gem quality’ or ‘cuttable’ pieces; other minerals or...Tourmaline Former Czechoslovakia Garnet Opal Gem-testing laboratories, museums, and specialist gemstone...Aquamarine Chrysoberyl Diamond Emerald Ruby Sapphire Sri Lanka Chrysoberyl Garnet Ruby Sapphire Spinel Topaz...wind, or water and deposited elsewhere. Eluvial gem deposits are formed as a result of the weathering...pockets or areas along riverbanks or within gravels (gem gravels). Therefore, alluvial gemstone deposits |
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| touchstone? Rounded, concentric deposits of common (not gem) opal, white or gray in color, are called geyserite...silicate. Most of it is found on the plains of the province of Eskisehir, in west-central Turkey. It is so...flake gold and is the kind washed up in stream gravels. Mark Twain tells of his sad experience with biotite...place to the mineralogist. It n1eans the broad district, centering around Joplin, Missouri, where the...and muscovite and biotite mica. Among the familiar gem minerals are garnet, beryl, apatite, corundum, tourmaline |
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| geyserite? Rounded, concentric deposits of common gem) opal, white or gray in color, are called geyserite...sively for pipe as sepiolite, plains of the province of Eskisehir, in west-central porous that when...flake gold and is' the kind washed up in stream gravels. Mark Twain tells of his sad experience with biotite... one particular place to the just the broad district, centering at Joplin, Missouri, where the vast...pegmatites different minerals Among the familiar gem and minerals are corundum, tourmaline, spodumene |
