A rock-breaking hammer, also known as a rock hammer or geological hammer, is a tool used by geologists, paleontologists, and archaeologists to break and examine rocks, fossils, and other geological specimens. It is designed to deliver a sharp blow to rocks, allowing them to be fractured or split for closer examination.

　　Rock-breaking hammers typically have a hardened steel head with a sharp, chisel-like edge on one end and a pointed tip on the other. The head is usually attached to a handle made of wood, fiberglass, or steel. The weight of the hammer can vary depending on the intended use, with lighter hammers used for delicate work and heavier ones for more substantial rocks or harder materials.

　　To use a rock-breaking hammer, you position the sharp edge or point of the hammer against the rock surface and strike it with a forceful blow. This helps to break the rock along its natural fractures or weak points. The process is repeated until the desired fracture or splitting is achieved, allowing for examination of the interior or extraction of specific samples.

　　It's important to note that using a rock-breaking hammer requires caution and protective gear, such as safety goggles and gloves, as rock fragments can be sharp and may cause injury. Additionally, it's essential to follow safety guidelines and use the tool appropriately to prevent accidents.