Gemstones of East Africa PDF Download
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Author: Peter C. Keller
Publisher:
ISBN: 9780945005087
Category : Science
Languages : en
Pages : 144
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Book Description
Gives the gem and mineral collector a book on gemstones and their occurrences, deposits and mining in Kenya, Uganda, and Tanzania.
Author: Peter C. Keller
Publisher:
ISBN: 9780945005087
Category : Science
Languages : en
Pages : 144
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Book Description
Gives the gem and mineral collector a book on gemstones and their occurrences, deposits and mining in Kenya, Uganda, and Tanzania.
Author: Bruce Cairncross
Publisher: Penguin Random House South Africa
ISBN: 1775846989
Category : Nature
Languages : en
Pages : 372
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Book Description
East Africa is famous for its world-class gemstones and mineral specimens, most notably the highly sought-after blue tanzanite, found only in Tanzania in a very small area in the northeast. Many other minerals and gemstones are mined in the region and this is the first publication to showcase and examine those occurring in the five countries that make up East Africa – Kenya, Tanzania, Rwanda, Uganda and Burundi. The book includes: An introduction to the fascinating geology of the region, including a map depicting underlying geology and mineral occurrence; detailed descriptions of minerals, including their gemological properties, history, occurrence and diverse uses across all spheres of life (from jewellery to numerous household items and even space-shuttle components); multiple full-colour photographs of each mineral and gem specimen. An invaluable reference for collectors, gemologists, students and anyone with an interest in the earth sciences. Sales points: A first, fascinating record of East African minerals and gemstones; numerous beautiful photographs of each mineral in full colour; concise, authoritative and accessible text.
Author: Didier Brodbeck
Publisher: Watchprint.com Sarl
ISBN: 9782940506118
Category : Antiques & Collectibles
Languages : en
Pages : 0
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Book Description
Tanzanite is one thousand times rarer than diamonds The first book ever presenting this precious stone discovered only forty years ago Upon the discovery of Tanzanite in Tanzania a specimen was entrusted to the stonecutter Manuel de Souza, who shared some samples with distinguished gemologists. While the prospector thought that he had found some sapphires, he was astonished to learn that he had unearthed something altogether extraordinary. The new gem immediately caught the eye of Tiffany & Co. Since 1968, the New York-based jeweler has pushed the stone into the spotlight. It launched a campaign that was successful enough to earn tanzanite the noble title of 'gem of the 20th century'. Tanzanite gained further renown when in 2002 the American Gem Trade Association (AGTA) named tanzanite, together with turquoise, the birthstones for December. Tanzanite's transformations have ultimately placed it alongside the most precious of precious gems. In short, tanzanite's age of glory has finally dawned. Needless to say, tanzanite's allure has attracted the attention of a list of famous designers: Lorenz Baumer (France), Ruth Grieco (Brazil), Catherine Sauvage (Germany), MVee (Hong Kong) and TTF (China). In Asia and elsewhere, tanzanite is seen as the source of happiness for the happy few. Tanzanite: Born from Lightning showcases hundreds of beautiful pieces of tanzanite jewelry, including superb creations made by Boucheron, Bulgari, Cartier, Chanel, Chaumet, Chopard, Dior, Boucheron, Louis Vuitton, Piaget, Van Cleef & Arpels, Wallace Chan and more."
Author: Roger Dedeyne
Publisher: Gemstone Identification
ISBN: 9078768010
Category : Precious stones
Languages : en
Pages : 311
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Book Description
Author: Nathaniel Mathews
Publisher:
ISBN: 9780965600163
Category :
Languages : en
Pages : 176
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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.
Author: Richard W. Wise
Publisher: Brunswick House
ISBN: 9780972822329
Category : Antiques & Collectibles
Languages : en
Pages : 0
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Book Description
Finally the real truth about how master jewellers, gemmologists and major auction houses value diamonds and colored gemstones.
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: Kennie Lyman
Publisher: Touchstone
ISBN: 9780671604301
Category : Nature
Languages : en
Pages : 388
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Book Description
Simon & Schuster's Guide to Gems and Precious Stones provides both the connoisseur and the casual collector with a compact, easy-to-use volume describing more than 100 rare varieties of minerals whose beauty and mystery have possessed our imaginations from time immemorial. More than 450 brilliant photographs accompany profiles of each gem, covering such aspects as appearance, physical properties -- density, hardness, refraction -- occurrence, and how to judge quality and value. Additional sections describe the process of cutting gemstones and the techniques professional gemologists use to evaluate a stone's weight and optical properties. Detailed and comprehensive, this book is essential for anyone interested in the study of gems and precious stones.
Author: Michael Bycroft
Publisher: Springer
ISBN: 3319963791
Category : History
Languages : en
Pages : 369
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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.
