FUSED SILICA MELTING CRUCIBLES FOR GOLD, SILVER and SCRAP ALLOY 20dwt (31g) Capacity Clay bonded fused silica melting dish to withstand temperatures up to 2800°F/1538°C. It has good thermal conductivity and will not contaminate metal alloys, chromium, gold or silver. Used by jewelers all over the world to melt gold, silver, brass, scrap alloy and other non-ferrous metal, propane, acetylene, or natural gas jewelers torches. The crucible is equipped with pouring spout. TOP QUALITY Diameter Height Dimensions Capacity 2-1/4" 7/8" 60mm x 17mm 20 dwt/31 g IDEAL FOR MELTING SCRAP.