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Beryllium-Treated Rubies and Sapphires
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.
Ruby and Sapphire
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, delvi...
Equality, Participation and Inclusion 2
What are the experiences of children and young people? How can we think about the challenges they face? What systems and practices can support them? How can we develop greater equality, participation and inclusion across diverse settings? This second edition of Equality, Participation and Inclusion 2: Diverse Contexts is the second of two Readers aimed at people with an interest in issues of equality, participation and inclusion for children and young people. This second Reader focuses in particular upon the diverse experiences and contexts in which children and young people encounter issues of equality, participation and inclusion. Comprising readings taken from the latest research in journ...
Ruby, Sapphire & Emerald Buying Guide
This guide helps buyers to evaluate these spectacular gems and it updates professionals on new treatments and sources of corundum and emerald. Using close-up photographs, the book shows how to make visual judgements about clarity. transparency, cut quality and brilliance. In addition, it helps you to understand lab reports and find appraisers and labs. You will also get tips on detecting imitations and synthetic stones. Let this guide provide the in-depth information you will need to be a smart buyer. Topics in this guide include: Quality evaluation; Gem treatments; Fakes and synthetics; Lab reports; Geographic sources; Appraisals; Gem cleaning & care; Savvy buying.
Laser - Surface Interactions
This book is about the interaction of laser radiation with various surfaces at variable parameters of radiation. As a basic principle of classification we chose the energetic or intensity level of interaction of laser radiation with the surfaces. These two characteristics of laser radiation are the most important parameters defining entire spectrum of the processes occurring on the surfaces during interaction with electromagnetic waves. This is a first book containing a whole spectrum of the laser-surface interactions distinguished by the ranges of used laser intensity. It combines the surface response starting from extremely weak laser intensities (~1 W cm-2) up to the relativistic intensit...
Redefining Dionysos
This book contributes to the understanding of Dionysos, the Greek god of wine, dancing, theatre and ecstasy, by putting together 30 studies of classical scholars. They combine the analysis of specific instances of particular dimensions of the god in cult, myth, literature and iconography, with general visions of Dionysos in antiquity and modern times. Only from the combination of different perspectives can we grasp the complex personality of Dionysos, and the forms of his presence in different cults, literary genres, and artistic forms, from Mycenaean times to late antiquity. The ways in which Dionysos was experienced may vary in each author, each cult, and each genre in which this god is involved. Therefore, instead of offering a new all-encompassing theory that would immediately become partial, the book narrows the focus on specific aspects of the god. Redefinition does not mean finding (again) the essence of the god, but obtaining a more nuanced knowledge of the ways he was experienced and conceived in antiquity.
