The Carlos Museum houses an excellent collection of carved gems from throughout the ancient world. In antiquity the carved surface would have been pressed into either wax or clay to transfer the image. In collections gems are generally displayed with impressions in clay or casts in plaster. This slide presentation describes the process used in our Museum lab to make accurate and reproducible casts from the gems using silicone rubber molds.
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For more information on the Carlos Museum, visit http://carlos.emory.edu/