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Author: Ted Themelis
Publisher: Ted Themelis
ISBN: 9780940965409
Category : Rubies
Languages : en
Pages : 48
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Book Description
This book is the product of self-supported and painstaking research work of 47 experiments on 30,000 natural and synthetic rubies and sapphires treated with beryllium by Ted Themelis in his thermochemical GEMLAB laboratory in Bangkok from May 2002 to January 2003. This book deals with the gemological and technical aspects in high temperature heat-treatment of rubies and sapphires with beryllium additives.
Author: Ted Themelis
Publisher: Ted Themelis
ISBN: 9780940965409
Category : Rubies
Languages : en
Pages : 48
Get Book Here
Book Description
This book is the product of self-supported and painstaking research work of 47 experiments on 30,000 natural and synthetic rubies and sapphires treated with beryllium by Ted Themelis in his thermochemical GEMLAB laboratory in Bangkok from May 2002 to January 2003. This book deals with the gemological and technical aspects in high temperature heat-treatment of rubies and sapphires with beryllium additives.
Author: Ted Themelis
Publisher:
ISBN: 9780940965577
Category : Rubies
Languages : en
Pages : 291
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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: Ted Themelis
Publisher: Ted Themelis
ISBN: 9780940965102
Category : Art
Languages : en
Pages : 236
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Book Description
Author: Isidore Kozminsky
Publisher:
ISBN:
Category : Charms
Languages : en
Pages : 488
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Book Description
Author: J. F. Halford-Watkins
Publisher:
ISBN: 9780964509702
Category :
Languages : en
Pages : 434
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Book Description
Prior to the 1930s, ruby and sapphire were mysteries, arcane gems oft-confused with spinel and other look-alikes. Enter Col. J.F. Halford-Watkins. Living in Mogok, Burma for more than two decades, he penned several articles and an entire monograph on the subject of these rare gems. Sadly he passed away before it could be published. In 1994, Richard Hughes came across a reference to the manuscript. Patrick Streeter, grandson of G. Skelton Streeter, and great grandson of the famed London jeweler, Edwin Streeter, had mentioned the Halford-Watkins manuscript while writing his book, Streeter of Bond Street. Following up on that obscure reference Richard Hughes stumbled upon something truly fantastic, an undiscovered treasure of the gemological literature. Over ten years in the making, The Book of Ruby & Sapphire is the realization of Halford-Watkins' vision. Professionally edited and illustrated, it represents a gemological tour de force.
Author: Lance Grande
Publisher: University of Chicago Press
ISBN: 0226305112
Category : Design
Languages : en
Pages : 387
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Book Description
"Gems and Gemstones" features nearly 300 color images of cut gems, precious and semiprecious stones, gem-quality mineral specimens, and fine jewelry to be unveiled in the new Grainger Hall of Gems at the Field Museum in Chicago.
Author: Karl Schmetzer
Publisher:
ISBN: 9783510652624
Category : Alexandrite
Languages : en
Pages : 141
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Book Description
Alexandrite, a variety of chrysoberyl, and one of the finest colour-change natural gemstones, may almost be called "the national gemstone of Russia". This great prestige is based on two facts: its noble name in honour of the Tsarevich Alexander Nikolaevich (the future Tsar Alexander II) and its dazzling colours, green in daylight and red in incandescent light, the military colours of Imperial Russia. Although quantities of facetable quality alexandrite are considerably less than those of emerald, alexandrite is counted among and compared to the "big four" of the gem business: diamond - ruby - sapphire - emerald. In this book the authors present an historical overview of emerald mining in the Urals, the discovery of Russian alexandrites in the Uralian emerald mines, the naming and historical use of alexandrites and their appearance and display in mineralogical museums and the gem trade. Morphology and twinning of rough alexandrite is described for single crystals, single contact twins and cyclic twins (trillings). Mineralogical and gemmological properties are thoroughly explained and numerous photo-micrographs of inclusions and growth patterns in faceted samples are presented. Chatoyancy and asterism of alexandrite and chrysoberyl from Russia and Sri Lanka are also described. A further chapter deals with characteristic growth patterns of Russian, other natural and synthetic alexandrites. Colorimetric data of Russian alexandrites and green chrysoberyls are explained using the CIELAB colour space, and the distinction between these varieties is explained. A chapter on trace element chemistry and locality determination rounds off the book. An extensive appendix containing lists of historical names, a time table and numerous references provides valuable information on Russian alexandrites for all researchers in the mineralogical and gemmological fields as well as for gemmological laboratories, jewellers and gem dealers. Consequently, this book, illustrated with more than 200 colour figures and photographs, addresses mineralogists, gemmologists, historians, mineral and gem collectors as well as all members of the gem trade.
Author: Supakit Achiwawanich
Publisher:
ISBN:
Category : Precious stones
Languages : en
Pages :
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Book Description
Heat treatment of ruby and sapphire has been extensively practised in order to enhance their visual appearance. Even though research on the bulk properties of the gemstones has been performed comprehensively, surface studies of heat-treated natural ruby and sapphire are very limited. The aims of this thesis are: to demonstrate potential capacities of non-invasive surface techniques including X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) on the natural Mong Hsu ruby and Kanchanaburi sapphire, and to elucidate surface effects after heat treatments in different atmospheric conditions commonly practised in the commercial arena. Preliminary studies using cathodoluminescence (CL) and X-ray computerised tomography (XCT) on heat treated gemstones are also given in the thesis.
Author: Mohsen Manutchehr-Danai
Publisher: Springer Science & Business Media
ISBN: 3662042886
Category : Science
Languages : en
Pages : 575
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Book Description
The rapid growth of gemological sciences and mineralogy demands a dictionary such as this for gemologists, mineralogists, geologists, jewel dealers, industry and hobbyists. With some 16,000 comprehensive definitions, supplemented by more than 250 diagrams and figures, this is a one-stop reference to any matter dealing with gems and gemology.
