... conductivity .Mainly used for Precious metal smelting and casting( gold&silver&copper melting and casting),refractory product,jewelry industry, ... crucible,jewlery crucible ,graphite melting crucible, melting crucible,smelting crucible, graphite casting crucible, crucible for melting, gold melter, silver&gold melting ... , KRUPP, MANFREDI, SAED, BUFFALO, NOBILIUM, REITEL, EMMEVI etc. gold melting crucible