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Author: Jules Roger Sauer
Publisher:
ISBN: 9780804814096
Category :
Languages : en
Pages : 136
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Book Description
Author: Jules Roger Sauer
Publisher:
ISBN: 9780804814096
Category :
Languages : en
Pages : 136
Get Book Here
Book Description
Author: Jules Roger Sauer
Publisher:
ISBN:
Category : Gems
Languages : en
Pages : 136
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Book Description
Author: Jules Roger Sauer
Publisher:
ISBN:
Category :
Languages : en
Pages : 144
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Book Description
Author: H. Stern (Firm)
Publisher:
ISBN:
Category : Precious stones
Languages : en
Pages : 35
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Book Description
Author:
Publisher:
ISBN:
Category : Brazil
Languages : en
Pages : 194
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Book Description
Author: Patrick J. V. Delaney
Publisher: Editora Rem-Revista Escola de Minas
ISBN: 9788586112027
Category : Geology
Languages : en
Pages : 125
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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: Jules Roger Sauer
Publisher:
ISBN:
Category : Emerald mines and mining
Languages : pt-BR
Pages : 48
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Book Description
Author: H. Stern (Firm)
Publisher:
ISBN:
Category : Gems
Languages : en
Pages : 40
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Book Description
Author: Frederick H. Pough
Publisher:
ISBN:
Category :
Languages : en
Pages : 20
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Book Description
