Gemstones and Their Origins PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Gemstones and Their Origins PDF full book. Access full book title Gemstones and Their Origins by P.C. Keller. Download full books in PDF and EPUB format.
Author: P.C. Keller
Publisher: Springer Science & Business Media
ISBN: 1468466747
Category : Science
Languages : en
Pages : 315
Get Book Here
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: P.C. Keller
Publisher: Springer Science & Business Media
ISBN: 1468466747
Category : Science
Languages : en
Pages : 315
Get Book Here
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: Yavorskyy Co Ltd.
Publisher:
ISBN: 9780692919682
Category :
Languages : en
Pages : 236
Get Book Here
Book Description
Author: George Frederick Kunz
Publisher:
ISBN:
Category : Gems
Languages : en
Pages : 42
Get Book Here
Book Description
Author: Derek J. Content
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Peter Bancroft
Publisher:
ISBN: 9780961346119
Category : Mineralogy.
Languages : en
Pages : 488
Get Book Here
Book Description
100 field trips to many of the world's exotic gem and crystal mines.
Author: Richard W. Hughes
Publisher:
ISBN: 9780964509719
Category :
Languages : en
Pages : 816
Get Book Here
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.
Author: Julius Wodiska
Publisher:
ISBN:
Category : Precious stones
Languages : en
Pages : 482
Get Book Here
Book Description
Author: Isidore Kozminsky
Publisher:
ISBN:
Category : Charms
Languages : en
Pages : 488
Get Book Here
Book Description
Author: Kim Rix
Publisher:
ISBN: 9781912635238
Category : Antiques & Collectibles
Languages : en
Pages : 98
Get Book Here
Book Description
This travel guide is for anyone considering a trip to the beautiful country of Sri Lanka in search of a special memory to treasure forever. Written by Kim Rix, a gemmologist (GIA) and professional photographer who has travelled to more than 50 countries, this unique book unveils how you can become a `Gemstone Detective' on your next adventure. If you are considering purchasing a gemstone or piece of jewellery, this book is essential reading on the plane over to Sri Lanka! It is a mine of expert advice, insider information and practical tips to help you better understand the gemstone and jewellery market. As well as offering country-specific background and up-to-the-minute advice, the `Gemstone Detective' series, is a `how to' guide for anyone who wants to experience the fun, excitement and romance of buying unique and beautiful gems or jewellery in countries around the world renowned for their natural gemstones. Kim Rix is dedicated to visiting each country in the `Gemstone Detective' series to provide readers with the best advice and easy-to-follow steps to help travellers avoid the pitfalls, scams and disappointments of a bad buying decision.
Author: Michael Bycroft
Publisher: Springer
ISBN: 3319963791
Category : History
Languages : en
Pages : 369
Get Book Here
Book Description
This edited collection is an interdisciplinary study of gems in the early modern world. It examines the relations between the art, science, and technology of gems, and it does so against the backdrop of an expanding global trade in gems. The eleven chapters are organised into three parts. The first part sets the scene by describing how gems moved around the early modern world, how they were set in motion, and how they were pulled together in the course of their travels. The second part is about value. It asks why people valued gems, how they determined the value of a given gem, and how the value of a gem was connected to its perceived place of origin. The third part deals with the skills involved in cutting, polishing, and mounting gems, and how these skills were transmitted and articulated by artisans. The common themes of all these chapters are materials, knowledge and global trade. The contributors to this volume focus on the material properties of gems such as their weight and hardness, on the knowledge involved in exchanging them and valuing them, and on the cultural consequences of the expanding trade in gems in Eurasia and the Americas.
