This unusual work is a complete treatise on the identification of precious stones that is thoroughly recommended for inclusion on the jeweller or antiquarian's bookshelf. Contents Include: Preface; How to Use The Book; Refractive Index and its Measurement; Double Refraction and How to Detect it; Colour, Colour Filters and the Dichroscope; Specific Gravity and How to Measure It; Detection of Synthetic and Imitation Stones; The Use of the Microscope; The Identification of Diamond; The Identification of Ruby; The Identification of Sapphire; The Identification of Emerald; Aquamarine and Alexandrite; The Identification of Zircon; The Identification of Topaz; The Identification of Pink, Mauve, etc. Stones; The Identification of Brown and Orange Stones; Quartz, Opal, and Garnets; Tourmaline, Peridot, and Spinel; Identification of Translucent and Opaque Stones; Amber, Tortoiseshell, Coral, and Jet; Pearls: Real, Cultured, and Imitation; Appendix: Glossary, Alphabetical Summary of Gem Species, Crystal Systems, Bibliography, Specific Gravity and Refractive Index Tables; Names and Addresses of Recommended Suppliers; and an Index. Many of the earliest books, particularly those dating back to the 1900s and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.
Tombs, G. A., 'Notes on identification of Gilson synthetic opals', Australian Gemmologist, 12, 6 (May 1975) 7. Arnould, M., Poirot, J. P., ... Anderson, B. W., 'Notes from the laboratory', Journal of Gemmology (January 1972) 9.
Malawi Corundum, including both ruby and sapphire, some of gem quality, was reported in 1958 from Chimwadzulu Hill in the south of Malawi, Central Africa (Rutland, 1969). In 1967–68 an organization was set up to mine and market the ...
This revised edition covers the latest gems, synthetics, treatments and instruments.
This book contains classic material dating back to the 1900s and before.
The final chapter deals with the composition of synthetic gemstones. This book is a valuable resource for gemmologists and jewelers. Students who intend to become a qualified gemologist will also find this book extremely useful.
An easy-to-use book that shows how anyone can learn to identify most of the gems and synthetics found in the marketplace. This practical book is essential reading for collectors, dealers,...
Same as artificial mineral. — Imitation, synthetic. artificial treatment of gemstones; certain gems and ornamental stones are enable to treatment, which alters the color to one more attractive. The inducement of Aroo pearl — Ashton ...
Practical Gem Testing
This is the seventh edition of a book which has been for years the 'bible' of professional and amateur gemmologists, as well as retail jewellers. Originally written by Robert Webster,...
Until 1933, the refractometer and the microscope were the two principal tools in gem testing. Then, B W Anderson introduced the hand spectroscope which quickly became the third vital instrument...