Jewellery and Gemmology reference books: Your Gold and Silver, an easy guide to appraising household objects, coins, heirlooms and jewellery, by Henry A. Merton, pub by Macmillam Publishing, 1981 (softcover); The Gold Jewellery Buying Guide, by Renée Newman, pub by International Jewelry Publications, 1993 (softcover); Diamonds and Diamond Grading, by G. Lenzen, pub by Butterworth, 1983 (hardcover); Diamond Ring Buying Guide, 5th edition, by Renée Newman, pub by International Jewelry Publications, 1996 (softcover); Cultured Pearls: Gifts of Nature, pamphlet, pub by Japan External Trade Organisation - Japan Pearl Exporters’ Association; Pearl Buying Guide, 4th edition, by Renée Newman, pub by International Jewelry Publications, 2004 (softcover); The Pearl Book: The definitive buying guide, by Antoinette L. Matlins, pub by GemStone Press, 1996 (softcover). [7] £50-£70