HMNS Welcomes the Siren of Serendip, One of the World’s Top Sapphires

Siren of Serendip available only for Limited Time

Courtesy of HMNS

The Siren of Serendip, one of the world’s largest blue sapphires, will be on display in the Brown Gallery at the Houston Museum of Natural Science from March 3 through 24 just in time for spring break.

Considered one of the top five sapphires in the world, the Siren of Serendip weighs a phenomenal 422.66 carats and was discovered almost a century ago on the island of Ceylon (now Sri Lanka). When found, the original rough crystal weighed 2,670 carats before it was cut and polished.

A Perfect Setting

A glorious gem deserves a glorious setting. Master jeweler Ingo Henn of London and Idar-Oberstein, Germany was commissioned to design a jewelry piece for the Siren of Serendip.

Photo courtesy of HMNS

A white gold and platinum necklace was chosen to showcase the blue color of the Siren of the Serendip. The sapphire is the focal point of the piece, but the necklace also includes 913 diamonds, totaling 36.30 carats.

Origin Story

The gemstone’s name refers in part to the sirens of Greek mythology, whose irresistible—yet unattainable—beauty captivated all who beheld them.

The second half of its name refers to the ancient Persian word for Ceylon, Serendip, and also serves as a nod to the serendipity the museum feels at having the opportunity to own this stunning piece.

Ceylon sapphires are world renowned for their size, color and abundance. Sri Lankan mines hold the record for the largest fine quality faceted blue sapphires in the world.

photo: ABC13

Jewelry aficionados and geology geeks alike will be in awe of this glistening gemstone and its stunning diamond setting. Guests can see it in the Brown Gallery during their trips to the Houston Museum of Natural Science this March. Tickets will be $5 in addition to general admission.

The Siren of Serendip is now on display at the Houston Museum of Natural Science. For ticket prices or more information, visit or call (713) 639-4629.