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The lost wax investment casting method is used to make sterling silver belt buckles and other types of metal jewelry. First, a belt buckle design is sculpted in wax. Next, the wax sculpture is covered with plaster and allowed to dry. The plaster covered sculpture is baked in a kiln, and the wax melts away to leave a plaster mold. Sterling silver is then poured into the mold. After cooling, the plaster is broken off to reveal the sterling silver buckle casting.