Dictionary of Gems and Gemology
Since World War II the amount of information generated in the science of Gemology has increased tremendously. Therefore this book "Dictionary of Gems and Gemology" was written with the aim of providing a "relatively" complete dictionary to assist all students, hobbyists, scientists and interested parties in the fields of Gems and Gemology. The forerunner to this book was called "Dictionary of Gems and Gemology" (English-Persian, Persian-English, published in Tehran Iran in 1997). It was written with the aid of more than thirty refer ence books relating to gemology. In response to the effort required to clarify the terms within, I decided to compile a book that brings all the relevant terms into one book. This new book eliminates the use of different reference books and compiles nearly all the relevant terms into a one-stop useful text. It took twenty five years to collect the terms and the information so as to present a complete and functional lexicon. The text is supported by nearly 170 illustrations and 21 tables to provide detailed and succinct information. I hope and trust that this book will reach the high standard of other gemological dictionaries. If you have criticisms or suggestions, please feel free to contact me. Professor Dr. Mohsen Manutchehr-Danai Los Angeles, Tehran, Regensburg Acknowledgments The author acknowledges all those who were of valuable assistance during the writ ing and publishing of this book.
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agate alluvial diamond deposit amber amethyst Australia banded beryl Birefringence blue Brazil brilliant cut Brittle brown cabochon calcite called Cape cat's-eye chalcedony chatoyancy chemical chrysoberyl Cleavage color grading colorless commercial term containing coral corundum crown crystal cultured pearls cut cabochon dark diamond imitation Diaphaneity doublet emerald facets feldspar fluorescence Formula Fracture garnet gemstones girdle glass gold gray green greenish heat hematite inclusions India ivory jade jadeite jasper Jewel jewelry kimberlite known lapis light luster marble metal microscope mineral misleading term monoclinic Myanmar opal opaque Optics ornamental oxide pale pavilion pink polished Present owner unknown prized by collectors quartz refractive index refractometer resin rock rough diamond ruby Russia rutile sapphire shell silicate South Africa spectrum spelled spinel Sri Lanka star stone Streak surface synonym term applied topaz tourmaline transparent to translucent turquoise twin variety vitreous X-ray yellow yellowish zircon