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A jewelry model is a master design that is copied to make many similar pieces of jewelry. The model may either be a piece of actual finished jewelry or a low-cost blank fashioned from base metal. In either case, the model is used to create the casting mold from which all subsequent pieces are made. Prefabricated models are available from a number of sources to supply the hobby and high-volume jewelry manufacture trade.
Original source: https://en.wikipedia.org/wiki/Jewelry model.
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