The Logan Sapphire: A Gem of Remarkable History and Elegance

The Logan Sapphire: A Gem of Remarkable History and Elegance


The Logan Sapphire

The Logan Sapphire // Smithsonian Institute


The world of precious gemstones is filled with stories of opulence, intrigue, and fascination. Among these jewels, the Logan Sapphire stands as a testament to both the natural beauty of the earth and the remarkable tales woven around its ownership. This deep blue gem, known for its stunning hue and impressive carat weight, has captivated the hearts of many notable figures throughout history. In this article, we will delve into the Logan Sapphire's significant owners, its fascinating backstory, its vital statistics in terms of carat weight and size, and its remarkable value in the world of gemstones.


Part I: The Logan Sapphire - A Gem of Distinction

The Logan Sapphire, a resplendent blue sapphire, is a member of the corundum family of minerals. Corundum, composed primarily of aluminum and oxygen, is the mineral responsible for some of the world's most famous gemstones, including sapphires and rubies. What sets the Logan Sapphire apart is its enchanting deep blue color, reminiscent of the endless ocean, and its remarkable size.


Carat Weight and Size

The Logan Sapphire is an awe-inspiring gem, weighing an astonishing 423 carats (84.6 grams). Its size is equally impressive, measuring approximately 2.65 inches by 1.9 inches by 1.1 inches. This sheer magnitude places it among the largest faceted blue sapphires in existence, ensuring its status as a true marvel of the gemstone world. The sapphire is surrounded by 20 round-cut brilliant diamonds with a total carat weight of 16 carats and is set in a silver and gold brooch.


Origin and Characteristic Blue Hue

The Logan Sapphire's captivating blue hue is attributed to the presence of trace elements, primarily iron and titanium, during its formation deep within the Earth's crust. Its intense blue color, combined with its size and clarity, contributes to its exceptional value and desirability among collectors and connoisseurs.


Part II: The Logan Sapphire's Remarkable Journey Through Time

Discovery and Early History

H.H Raja Shrimant Sir Ranjit Singhji Raja of Ratlam 

H.H. Raja Shrimant Sir Ranjit Singhji Sahib Bahadur, Raja of Ratlam. c. 15th January,1887 // Dr John William Tyler

The Logan Sapphire's journey through time begins in the rich gem mines of Sri Lanka, where it was first discovered. The exact date of its discovery remains shrouded in mystery, but it is believed to have been found centuries ago, amid the lush landscapes of this gem-rich island.

The story of the Logan Sapphire's ownership by the Maharaja of Ratlam adds an intriguing and exotic dimension to the gem's history. While precise historical records are scarce, legend and anecdotal evidence suggest that this exceptional blue sapphire found its way into the possession of Indian royalty, specifically the Maharaja of Ratlam.

In the realm of Indian royalty, gemstones of extraordinary size and quality were often regarded as symbols of power, wealth, and prestige. Blue sapphires, with their deep and mesmerizing hue, held a particular fascination for Indian maharajas, making the Logan Sapphire a prized addition to the Maharaja of Ratlam's jewelry collection.

The Maharaja of Ratlam was a title held by the ruling monarch of the princely state of Ratlam in central India. During the 19th and early 20th centuries, India was a land of immense wealth, opulence, and extravagant courts, with many maharajas amassing immense collections of treasures, including jewelry. The Logan Sapphire is believed to have been part of this rich tapestry of Indian regal heritage.

It is believed that His Highness Raja Shrimant Sir Ranjit Singhji Sahib Bahadur, the Raja of Ratlam, owned the Logan Sapphire, and it was during his reign that the sapphire was sold to John Logan. He was born in February 1862 and stood as a prominent figure in the princely state of Ratlam, situated in central India. Despite his relatively young age at the time of ascending to the throne, he assumed the responsibilities of rulership in 1864, following the passing of his predecessor. His reign extended for nearly three decades, concluding in 1893, and it marked a period of significant development and progress within the state of Ratlam.

H.H. Raja Shrimant Ranjit Singhji Sahib Bahadur was known for his progressive outlook and his dedication to modernizing various aspects of his principality. During his rule, he initiated numerous reforms aimed at improving the lives of his subjects. These reforms included investments in infrastructure, education, healthcare, and social welfare programs, all of which contributed to the betterment of the people in the state.

His reign also saw an emphasis on the arts and culture, with support for local artists, artisans, and cultural traditions. This patronage helped preserve and promote the cultural heritage of Ratlam and enriched the region's artistic landscape.

While historical records do not confirm his ownership of the Logan Sapphire, his reign is an important part of the history of the princely state of Ratlam. His progressive policies and commitment to the welfare of his people left a lasting legacy in the region, making him a revered figure in its history. 

The exact details of the Logan Sapphire's journey from Sri Lanka to the Maharaja's treasury remain a tantalizing mystery, but its association with Indian royalty adds a layer of mystique and historical richness to this remarkable gem. Today, the Maharaja's ownership of the Logan Sapphire is a fascinating part of its multifaceted history, a story that spans continents and centuries.


The Logan Family - Owners Extraordinaire

The Logan Sapphire's association with the renowned Logan family is the most celebrated chapter of its history. The gem earned its name from its acquisition by the Logan family, who were American art collectors and philanthropists. The exact circumstances of their acquisition remain somewhat mysterious, adding to the allure of this extraordinary gem.


Ownership by Mrs. John A. Logan

Mrs John A Logan

Mary Cunningham Logan // Harris & Ewing


Mrs. John A. Logan, also known as Mary Cunningham Logan, played a pivotal role in the fascinating history of the Logan Sapphire. Born Mary Simmerson Cunningham on August 15, 1838, she married John Alexander Logan, a prominent American military general and political figure. Together, they formed a dynamic and influential couple in the late 19th century, leaving an indelible mark on American history and society.

Mary Cunningham Logan was not only the wife of a Civil War general but also a remarkable individual in her own right. She was an accomplished writer, lecturer, and socialite, known for her wit, charm, and deep interest in the arts. Her appreciation for beauty extended to her love for art and jewelry, making her an avid collector of precious gemstones and fine pieces of craftsmanship.

It was during this period of collecting that the Logan Sapphire came into her possession. The exact circumstances of its acquisition remain somewhat mysterious, adding an air of intrigue to the gem's history. However, it's clear that the Logan Sapphire held a special place in her heart, becoming a cherished family heirloom and a testament to her refined taste and appreciation for the finer things in life.

Mrs. Logan's ownership of the Logan Sapphire was emblematic of her prominence in the social and political circles of her time. Her role in preserving the gem's legacy and ensuring its eventual place in the Smithsonian Institution's National Museum of Natural History has solidified her position as a key figure in the gemstone's remarkable journey through history. Today, Mary Cunningham Logan's legacy lives on through her association with the Logan Sapphire, a gem that continues to captivate and inspire admirers worldwide.


Philanthropy and Legacy

The Logan family's decision to donate the Logan Sapphire to the Smithsonian Institution is a testament to their deep appreciation for the arts, history, and their commitment to preserving and sharing their treasures with the public. In the early 1960s, Mary Cunningham Logan, widow of General John A. Logan, made the momentous decision to contribute this magnificent gem, which had been a cherished family heirloom, to the Smithsonian's National Museum of Natural History in Washington, D.C.

The Logan Sapphire's journey to the Smithsonian marked a significant chapter in its storied history. This generous act of philanthropy not only enhanced the museum's collection but also ensured that the gem would be enjoyed by countless visitors for generations to come. The Smithsonian's reputation as a world-class institution dedicated to the preservation of knowledge and cultural artifacts made it a fitting home for such a rare and historically significant gem.

The Logan family's donation was not merely an act of giving but also a gesture that underscored the cultural and historical value of the Logan Sapphire. By placing it in the Smithsonian's care, they ensured that this remarkable gem would continue to inspire and educate visitors about the beauty of natural minerals and the enduring fascination with precious gemstones. Today, the Logan Sapphire remains one of the Smithsonian's prized possessions, captivating the imagination of all who have the privilege of seeing it on display. The Logan family's philanthropy stands as a legacy of their commitment to enriching the cultural heritage of the United States. The Logan Sapphire is now located in the Janet Annenberg Hooker Hall of Geology.


Part III: The Logan Sapphire's Enduring Value

Intrinsic Value

The Logan Sapphire

The Logan Sapphire //


The intrinsic value of the Logan Sapphire lies in its rarity, size, and stunning blue hue. Blue sapphires of this caliber are exceedingly scarce, making each one a treasure beyond compare. Its breathtaking color is a testament to nature's artistry, enhanced by the flawless faceting that brings out its brilliance.


Monetary Value

Valuing the Logan Sapphire is a complex task, as it transcends the traditional bounds of mere monetary worth. However, in terms of financial appraisal, it is difficult to provide a precise figure due to its unique status and the rarity of sapphires of this size and quality. Nevertheless, it is undoubtedly worth millions of dollars, a testament to its desirability among collectors and investors.


Cultural and Historical Value

Beyond its financial worth, the Logan Sapphire holds immense cultural and historical significance. It serves as a tangible link to the past, connecting us to the worlds of Indian royalty, American history, and the enduring allure of gemstones. Its presence in the Smithsonian Institution's collection ensures that it will continue to inspire and captivate generations to come.



The Logan Sapphire, with its captivating blue hue, astonishing size, and storied history, is a gem of unparalleled distinction. From its origins in the gem mines of Sri Lanka to its association with the illustrious Logan family and its current place of honor in the Smithsonian Institution, this remarkable gem embodies the essence of elegance, rarity, and enduring value. The Logan Sapphire remains an enduring symbol of nature's beauty and the enduring human fascination with precious gemstones, a jewel that will continue to shine brightly for generations to come.


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Duane McDonald I love you. ❤️

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