gemmology

n. study of precious stones

Gemology (gemmology outside the United States) is the science, art and profession of identifying and evaluating gemstones. It is considered a geoscience and a branch of mineralogy. Some jewelers are academically trained gemologists and are qualified to identify and evaluate gems. With further post-graduate training and experience they can qualify as appraisers (valuers). There are numerous professional schools and associations of gemologists and certification programs all over the world.Some gemologists specialize in various gemstones, such as diamonds or emeralds. The laboratory gemologists are expert in identification of origin.
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gemmology
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GEMMOLOGIA