The term 'crystal' often refers to a solid material whose constituents, such as atoms, molecules, or ions, are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. Crystals are known for their beauty and are used in various applications, from decorative items to technological devices. The concept of crystal is also used metaphorically to denote clarity or purity. In nature, crystals form through geological processes and can be found in diverse environments. Their unique properties make them valuable in science and industry. The study of crystals, known as crystallography, reveals much about their structure and potential uses.