Covalent crystals are a type of solid structure where atoms are bonded together by strong covalent bonds. This means that each atom shares electrons with its neighbors, creating a stable and rigid framework. Common examples of covalent crystals include diamond and silicon carbide, which are known for their hardness and high melting points. These crystals typically have a high degree of symmetry and can form various shapes, depending on the arrangement of atoms. Due to their strong bonding, covalent crystals are often insulators, meaning they do not conduct electricity well. Their unique properties make them valuable in various applications, including electronics and jewelry.