The primary component of diamonds is carbon. Diamonds are formed under high-pressure and high-temperature conditions deep within the Earth’s mantle. Over millions of years, carbon atoms bond in a crystal structure, resulting in the formation of this precious gemstone. The exceptional hardness of diamonds, as well as their brilliance and refractive properties, make them highly sought after for use in jewelry and industrial applications, such as cutting tools. Diamonds can come in various colors, but those that are colorless and transparent are typically the most valued due to their rarity and clarity.