Minerals > Tenacity


Tenacity refers to a set of properties that describes how cohesive the force is between atoms that hold the mineral crystal together. So several terms can describe this property: brittle, if a crystal can be cracked or broken; malleable, if it can be flattened without breaking; flexible, if it can be bent and remains bent after the removal of pressure; ductile, if it can be drawn into a wire; elastic, if it can be bent from shape but returns to the original shape after being released; and sectile, if it can be smoothly cut with a knife.



All specimens from the David J. Eicher Mineral Collection; images © David J. Eicher