👉 In crystallography, a crystalloid is a type of solid that has a crystalline structure. This means it has a regular arrangement of atoms or molecules in a three-dimensional space, with atoms arranged in a lattice-like pattern and bonded together by covalent bonds or metallic bonds. Crystalloids are found in all types of matter, including minerals, glass, ceramics, and plastics. Crystalloids can be classified into several different types based on their crystal structure. Some examples include: