What does choincoidal fracture mean?

A choncoidal fracture refers to a type of break in a material, typically glass or certain types of rock, characterized by smooth, curved surfaces that resemble the shape of a shell. This type of fracture occurs without the formation of distinct edges or sharp points, making it appear glossy and often reflecting light. Choncoidal fractures are commonly associated with materials that have a conchoidal cleavage, allowing them to break in a way that produces these unique curved surfaces.