Diamond, the birthstone for April, is renowned for its dazzling brilliance, remarkable durability, and timeless allure. As the hardest naturally occurring substance on Earth, these precious gems are formed deep within the Earth's mantle under extreme pressure and heat over millions of years. Their journey to the Earth's surface involves volcanic eruptions, which bring them closer to us. Diamonds come in various colors, including colorless, yellow, brown, blue, pink, and even black.