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基本説明
Provides an in-depth appreciation of the science of gemology, its history and practice.
Full Description
Since "Gemmology" was first published, thousands of readers have used it to gain an in-depth appreciation of the science of gemmology, its history and practice. This third edition has been revised to cover, in particular, this third edition has been revised to cover, in particular, new HPHT diamond enhancement methods and beryllium lattice diffusions techniques for corundum as well as the low pressure high temperature CVD synthesis of thick film diamond. It includes details of the Gemmological Associations recently introduced Foundation course, and provides examination notes. It contains essential information for the Gem-A exams; It is fully updated to cover recent advances and instruments. It is an invaluable resource for gemmologists worldwide.
Contents
Preface; Introduction; The geological origin & occurrence of gemstones and their localities; The chemical composition of gemstones; Crystallography; Cleavage, parting and fracture; Hardness; Specific gravity, density and relative density; Colour Lustre & sheen; Reflection & refraction; Polarization & pleochroism; Spectroscopy; Luminescent, electrical & thermal properties of gemstones; The hand lens, microscope & Chelsea filter; Gemstone enhancement; Synthetic gemstones & gemstone simulants; Identifying inorganic gemstones & gemstone simulants; Identifying inorganic gemstone simulants; Identifying organic gem materials & their simulants; The fashioning of gemstones; Practical gemstone identification, Appendices; Index
