How do crystalline solids differ from amonphous solids?

Crystalline solids have a well-ordered, repeating arrangement of atoms or molecules, resulting in distinct geometric shapes and sharp melting points. In contrast, amorphous solids lack this long-range order, leading to a more random arrangement of particles, which causes them to melt over a range of temperatures rather than at a specific point. This structural difference also results in varying physical properties, such as transparency and mechanical strength, between the two types of solids.