The Black Prince's Ruby: A Spine-Chilling History of the Stone That Stains the British Crown

The Enigma of the Black Prince's Ruby

Among the glittering treasures of the British Crown Jewels, one stone stands out not for its brilliance, but for its bloody history and identity. The Black Prince's Ruby, set prominently in the front of the Imperial State Crown, is not actually a ruby at all. It is a massive, irregular cabochon of red spinel, weighing approximately 170 carats. For centuries, this stone has been a witness to some of the most dramatic moments in European and British royal history. Its journey from the battlefields of medieval Spain to the Tower of London is a tale of conquest, murder, mistaken identity, and royal obsession. This article uncovers the true, spine-chilling story behind the gem that has stained the British Crown with the blood of kings and pretenders.

A Spinel by Any Other Name: The Great Impostor

The confusion between spinel and ruby is one of the most enduring mistakes in gemological history. For over 600 years, the Black Prince's Ruby was believed to be a ruby. In fact, many of the world's most famous historic "rubies" — including the Timur Ruby and the ruby in the Russian Crown — are actually red spinels. Spinels are magnesium aluminum oxides, while rubies are corundum. The two can appear nearly identical to the untrained eye, especially before the advent of modern gemological testing in the 19th and 20th centuries. The Black Prince's Ruby, with its deep crimson hue and lack of strong pleochroism, was easily mistaken for a fine ruby. It was not until the late 20th century that scientific analysis confirmed its true identity. Yet, the stone's historical value far exceeds any gemological distinction, and it remains one of the most revered objects in the Crown Jewels.

The Moorish King and the Battle of Najera (1367)

The story of the Black Prince's Ruby begins not in England, but in the Iberian Peninsula during the turbulent 14th century. The stone is first recorded as part of the treasure of Abu Said, the Moorish King of Granada. It was said to have been mined in the Badakhshan region of present-day Afghanistan, the legendary source of the world's finest spinels. In 1367, the Castilian civil war saw Pedro the Cruel, King of Castile, allied with Edward the Black Prince, the eldest son of King Edward III of England. They fought against the forces of Pedro's half-brother, Henry of Trastamara. At the Battle of Najera, the coalition defeated Henry's army. Abu Said, a supporter of Henry, was captured. In a notorious act of treachery, Pedro the Cruel promised to spare Abu Said's life in exchange for a colossal ransom — including the magnificent red spinel. After receiving the gem and other treasures, Pedro ordered Abu Said and his attendants murdered in their tent. The Black Prince, disgusted by the betrayal, nonetheless accepted the stone as part of his payment for his military services. It is from this moment that the stone became known as the Black Prince's Ruby, forever linking it to both the chivalric ideal and the dark underbelly of medieval politics.

The Stone in Exile: From Spain to England

The Black Prince's Ruby accompanied Edward back to England, where it became a treasured heirloom of the House of Plantagenet. Edward died of dysentery in 1376, a year before his father, leaving his young son Richard to inherit the throne as Richard II. The spinel passed to Richard, who wore it as a pendant. Historical records show that Richard, known for his love of luxury, had the stone set in a collar of pearls and gold. The dramatic fall of Richard II in 1399, deposed by his cousin Henry Bolingbroke (Henry IV), marked the first of many close calls for the stone. It was seized by the Lancastrians but was considered too valuable to destroy or give away. It remained in the royal treasury, passing from monarch to monarch, surviving the Wars of the Roses that tore England apart in the 15th century. By the time of Henry VII, the stone was described in inventories as "a great balas ruby" (an archaic term for spinel), and it was set into a crown for the first time.

Henry VIII and the Tudor Crown

The Tudor period saw the Black Prince's Ruby become a permanent fixture of English regalia. Henry VIII, a monarch obsessed with displaying his power and wealth, had the stone incorporated into a magnificent new crown, known as the Crown of Henry VIII or the Tudor Crown. This crown featured the spinel at the base of the cross pattee on the front, a position it still occupies today. Henry wore it at his coronation and on state occasions, and it appeared in portraits of the aging king. The stone survived the religious upheaval of the Reformation, when many gems and precious objects from monasteries and chapels were melted down or sold. Unlike those treasures, the Crown Jewels were safeguarded by the Crown itself. Henry's daughter, Elizabeth I, was also portrayed wearing the stone in several portraits, often in a closed crown or as a pendant. The Elizabethan era solidified the stone as a symbol of English sovereignty.

The Commonwealth and Oliver Cromwell: Saved by a Whim

The most perilous period in the history of the Black Prince's Ruby came during the English Civil War and its aftermath. After the execution of King Charles I in 1649, Oliver Cromwell and the Puritan Parliament ordered the destruction of the Crown Jewels. The monarchical symbols were seen as idolatrous and tyrannical. The royal regalia was broken up, the gold melted down into coins, and the gems were sold. Many disappeared forever. The Black Prince's Ruby, however, survived through a stroke of luck. It is recorded that a certain Colonel George Thomson, a parliamentary commissioner, purchased the stone from the parliamentary auction for the sum of £15. Instead of destroying it, he kept it as a curiosity. After the restoration of Charles II in 1660, the stone was retrieved and returned to the Crown. The new crown made for Charles II, from which the current Imperial State Crown is derived, once again featured the Black Prince's Ruby in its prominent position. The stone had witnessed the beheading of a king and the destruction of its setting, yet it remained intact, a silent survivor of the English Revolution.

The Imperial State Crown and Modern History

The Imperial State Crown, made for King George VI in 1937 (and later modified for Queen Elizabeth II), houses the Black Prince's Ruby at its very center, in the front band of the circlet. The crown is used at the State Opening of Parliament and is one of the most recognizable symbols of the British monarchy. The spinel, now drilled with a small hole and set with a smaller ruby, sits just below the famous Cullinan II diamond. During World War II, the Crown Jewels were hidden in secret locations, including a biscuit tin buried at Windsor Castle, to protect them from Nazi invasion. The Black Prince's Ruby was removed and hidden separately. In 1953, the stone was present at the coronation of Queen Elizabeth II, watched by millions worldwide. It has been worn by the Queen at every State Opening of Parliament since. The stone's long association with royalty, its persistent survival through revolutions, wars, and regime changes, gives it an almost talismanic quality. It is a tangible link to the medieval world.

Myths, Legends, and Misconceptions

Many myths surround the Black Prince's Ruby. One persistent legend claims that the stone was given to Edward by Pedro the Cruel as a gift of friendship, omitting the murder of Abu Said. Another story says the stone was originally a religious relic, perhaps from a temple in India. Yet another myth suggests that the stone changes color in the presence of danger or ill omens. None of these have any basis in historical record. The most significant myth, of course, is the identity of the stone itself: for centuries, it was believed to be a ruby, a stone that in medieval lapidaries was associated with royalty, passion, and protection from harm. The fact that it is a spinel does not diminish its historical weight.

Conclusion: The Enduring Power of a Flawed Stone

The Black Prince's Ruby is far more than a gemological curiosity. It is a stone that has witnessed the rise and fall of dynasties, the clash of armies, the murder of a king, and the survival of a monarchy against all odds. Its deep red color, often described as the color of pigeon's blood, evokes the bloodshed that accompanied its journey. Unlike flawless diamonds or perfectly faceted emeralds, the Black Prince's Ruby is rough, pitted, and an irregular shape — it has a drilled hole from its medieval mountings. It is, in a sense, imperfect, and that imperfection makes it all the more human and compelling. Today, as part of the Crown Jewels, it is seen by millions of visitors each year at the Tower of London. It continues to be a symbol of a crown that has endured for over a thousand years, laden with history, treasure, and trauma. The Black Prince's Ruby stands as a monument to the fact that the most valuable gems are never just stones — they are vessels of memory, bearers of identity, and witnesses to time.