A crucible is a container designed to withstand high temperatures, commonly used in laboratories and industrial processes. It is typically made from materials like ceramic, metal, or graphite, which can endure extreme heat without melting or deforming. Crucibles are essential for melting metals, conducting chemical reactions, and performing tests that require high thermal resistance. In metallurgy, crucibles play a crucial role in the smelting and refining of metals such as gold and silver. They allow for precise temperature control and help prevent contamination during the melting process. Proper use of a crucible ensures the integrity of the materials being processed.