Ceylon Island of Gems PDF Download
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Author: Elie L. Ménasché
Publisher: Asian Educational Services
ISBN: 9788120619326
Category : Gems
Languages : en
Pages : 88
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Book Description
A Compre Hensive Look At The Precious Gems Of Sri Lanka. A Classic.
Author: Elie L. Ménasché
Publisher: Asian Educational Services
ISBN: 9788120619326
Category : Gems
Languages : en
Pages : 88
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Book Description
A Compre Hensive Look At The Precious Gems Of Sri Lanka. A Classic.
Author: D. H. Ariyaratna
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 208
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Book Description
Author: Yavorskyy Co Ltd.
Publisher:
ISBN: 9780692919682
Category :
Languages : en
Pages : 236
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Book Description
Author: A. M. Ferguson
Publisher:
ISBN:
Category : Gold mines and mining
Languages : en
Pages : 450
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Book Description
Author:
Publisher:
ISBN:
Category : Precious stones
Languages : en
Pages : 68
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Book Description
Author: H. A. J. Hulugalle
Publisher:
ISBN:
Category : Gems
Languages : en
Pages : 4
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Book Description
Author: P.C. Keller
Publisher: Springer Science & Business Media
ISBN: 1468466747
Category : Science
Languages : en
Pages : 315
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Book Description
Each gem deposit-whether of primary origin in the parent rocks; or secondary as alluvial placers in valley floors, river gravels, or the sand of oceanic shelves presents an eloquent chronicle of the Earth's life story. It reveals to the expert the prodigious processes which formed the present crust of our planet, of which this volume discloses a small but exciting detail. The materials of the Earth's crust are the rocks. In this book, the author expounds on how they were formed, why they altered, why they became the cradles of precious gemstones, how they are categorized, and how they are now exploited by man. What initiates the growth of gemstones? How do they crystallize? Why do gemstones of the same species, originating from different sources, vary? What causes the occurrence of varieties? Why do diamonds, unlike other precious stones, occur not near the Earth's surface in its crust, but deep down beneath it in the upper mantle? These are only a few of the entrancing subjects discussed in this enlightening volume. The reader learns that the Earth is surprisingly alive and altering constantly-sometimes through slow and equable changes and at times by violent and tremendous cataclysms, events from which gemstones issue.
Author: Peter Bancroft
Publisher:
ISBN: 9780961346119
Category : Mineralogy.
Languages : en
Pages : 488
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Book Description
100 field trips to many of the world's exotic gem and crystal mines.
Author: Ceylon Committee for the British Empire Exhibition, 1924
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
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Book Description
Author: Richard W. Hughes
Publisher:
ISBN: 9780964509719
Category :
Languages : en
Pages : 816
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Book Description
From the dawn of time, ruby and sapphire have both attracted and fascinated humans in ways that few other items could.While objects of desire are found throughout the natural world, physical beauty is too often ephemeral. From the allure of a man, woman, flower or butterfly, through the fleeting moments of a sunset, there is little that lasts and practically nothing that can be passed down to our descendants. The exception is precious stones. Not only are they the most durable creations of mother nature, but their visual splendor is truly eternal.In this companion to his 2013 book, Ruby & Sapphire--A Collector's Guide, Richard Hughes examines these gems from the gemological standpoint, delving into these gems not just from the aesthetic, but also from the scientific point of view.The product of nearly 40 years of firsthand experience, it covers every aspect of the subject from A-Z. History, sources, prices, quality analysis, synthetics and treatments, everything is here. Ruby & Sapphire--A Gemologist's Guide represents the most comprehensive book ever written on a single precious stone. With over 1000 photos, maps and illustrations and 3500 references, it is nothing less than a tour-de-force of gemological scholarship.
