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A Reference of Gems, Metals, Formulas and Terminology for Jewelers By Bruce Knuth. A unique and practical tool for the bench jeweler and student, as well as the retail
jeweler. Easy to follow text and illustrations on many aspects of gems and jewelry including: a listing of gems and gem properties, a list of birthstones, diagrams of
more than 40 gem cutting styles, legal standards of diamond, gold and silver marketing, formulas and chemical preparations, ring size gauges and sizes, measurement conversion tables and more. Soft cover, 112 pages.