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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:
Publisher:
ISBN: 9788121232241
Category :
Languages : en
Pages : 79
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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: Caroline Corner
Publisher: London : J. Lane ; New York : J. Lane Company
ISBN:
Category : Sri Lanka
Languages : en
Pages : 404
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 198
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Book Description
Author: Horatio John Suckling
Publisher:
ISBN:
Category : Natural history
Languages : en
Pages : 452
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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: James Emerson Tennent
Publisher:
ISBN:
Category :
Languages : en
Pages : 724
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Book Description
Author: James Emerson Tennent
Publisher:
ISBN:
Category : Sri Lanka
Languages : en
Pages : 726
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Book Description
Author: Sir James Emerson Tennent
Publisher:
ISBN:
Category :
Languages : en
Pages : 752
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Book Description
