Gemmological Instruments: Their Use and Principles of OperationGemmological Instruments deals with the developments in diamond grading equipment and gem testing instruments since the publication of the first edition in 1978. These developments include improvements in the versatility and styling of existing instruments such as the reflectivity meter, the composite spectroscope, and the refractometer. It also addresses the criticisms in the first edition and provides a discussion of the advantages and disadvantages of different gem testing equipment. This book is organized into 16 chapters that describe groundbreaking instruments like the thermal conductiv. |
Contents
Gemstone characteristics and constants used | 9 |
Preparation and handling of gemstones | 20 |
Inspection aids | 33 |
Copyright | |
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absorption adjusted alexandrite Basic magnification battery beam blue calibrated carat Chapter CIBJO colour grading comparative value guide corundum crystal Cubic detector diamond grading diamond simulants dichroscope diffraction grating dispersion Eickhorst electronic emerald equipment eyepieces field of view Figure fitted fluorescence garnet Gem Instruments Corporation gem minerals Gem Testing Gemmological Instruments Ltd gemmologist Gemolite gemstone glass Hans-Günter Schneider heavy liquids identification illumination immersion incident light inclusions indicator Journal of Gemmology Krüss laboratory lamp lens light guide light source loupe luminescence measured Model Monoclinic mounted opal Orthorhombic pavilion polariscope polarising filter prism probe tip produced quartz range Rayner rays reading reflectivity meter refractive index refractometer rotated ruby sample sapphires scale specific gravity specimen spectra spectrometer spectroscope spectrum spinel stereo zoom stone holder strontium titanate surface table facet temperature test probe tester transparent Triclinic Trigonal tweezers ultra-violet lamps unit visible voltage wavelength weight X-ray yellow zircon