Among all the gemstones known to humanity, the diamond is perhaps the most extraordinary. It is neither the most colorful nor the oldest, yet with its unmatched hardness and pure brilliance, it has become the timeless symbol of light and eternity. The formation of a diamond begins when carbon is buried hundreds of kilometers beneath the Earth's surface, deep within the mantle. There, under conditions of extreme heat and immense pressure, it undergoes billions of years of transformation before finally emerging into existence. Such an extraordinary process of formation makes the diamond not merely a mineral, but one of nature's greatest miracles. From its earliest discoveries in the Indus Valley, to its treasured place among European royal collections, and finally to its worldwide circulation in the modern jewelry market, the history of the diamond has been closely intertwined with the development of human civilization, power, love, and desire. It has served as a symbol of royal authority, adorning crowns and scepters. It has also become a token of love, carrying the meaning of eternal devotion. In today's global commercial world, the diamond remains the only gemstone that has developed a universally recognized international standard of value. Yet the world of diamonds is not defined solely by brilliance, glory, beauty, and romance. Behind their dazzling appearance lie the hardships of mining, the cruelty and plunder of war, and the tragedy of "blood diamonds," revealing a far less familiar side of these remarkable gems. With the rapid advancement of modern science and technology, humanity has learned to reproduce the extreme conditions of the Earth's mantle and cultivate diamonds in laboratories that are almost indistinguishable from their natural counterparts. The greatest difference between natural diamonds and laboratory-grown diamonds lies not in their physical properties, but in their origin—one is created deep within the Earth's mantle, while the other is produced in a laboratory. The emergence of laboratory-grown diamonds has brought significant new challenges to both the value and the marketplace of natural diamonds. For this reason, a diamond is not merely a precious gemstone—it is also a mirror. It reflects humanity's pursuit of beauty, its desire for power, and its longing for faithful and enduring love. At the same time, it reflects the conflicts, wars, and choices that have shaped the modern world. This series will explore diamonds from multiple perspectives, introducing their geological formation, physical properties, and methods of quality evaluation. It will also recount the legendary stories behind some of history's most famous diamonds, while examining the changing role, significance, and influence of diamonds in culture and modern society. Through this series, readers will not only discover the dazzling brilliance of diamonds, but also gain a deeper understanding of the history, culture, and human nature that these extraordinary gemstones have carried throughout the ages.