The main element in a diamond is carbon. Diamonds are formed under high-pressure, high-temperature conditions deep within the Earth, where carbon atoms bond in a crystal lattice structure. This arrangement gives diamonds their exceptional hardness and brilliance, making them highly sought after for jewelry and industrial applications. The unique properties of diamonds, including their ability to refract light and their enduring nature, contribute to their status as symbols of luxury and love. While most people associate diamonds with their sparkling appearance, their composition as a form of carbon is fundamental to their formation and characteristics.