Crucibles, made of materials like graphite, clay-graphite, alumina, and platinum, are containers for materials subjected to high temperatures. Crucible tongs assist in handling crucibles safely. Hemostat-style tongs offer precise grip, while Berzelius-style tongs are sturdy. Spring-tension and friction-grip tongs provide adjustable force. Carbon fiber tongs are lightweight and durable. Ceramic tongs are suitable for high-temperature applications. Other materials used for crucible components include lids or liners of graphite, clay-graphite, alumina, and porcelain.