Ronald Winston Donates Rare Collection of Colored Diamonds to Smithsonian National Museum

The Smithsonian Museum of Natural History is set to unveil a dazzling new addition to its world-renowned National Gem Collection: a set of 41 rare natural colored diamonds, including a spectacular 2.33-carat fancy red diamond, one of the rarest in the world.

The collection, a generous gift from Ronald Winston, son of legendary jeweler Harry Winston, features a variety of colored diamonds ranging from 0.40ct-9.49ct and will debut on April 1 in the Winston Gallery, home to the famous Hope Diamond, also donated by the Winston family in 1958.

A selection of colored diamonds from the Winston Fancy Color Diamond Collection to be on display at the Smithsonian

(Photo credit: Robert Weldon, arranged by Gabriela Farfan - courtesy of Ronald Winston)

“This is among the most significant gifts the Smithsonian has ever received,” said Dr. Kirk Johnson, the museum’s Director. “The Winston diamonds are unparalleled in beauty and rarity. We extend our gratitude to Ronald Winston for making this gift to the nation possible."

Ronald Winston, who spent 60 years collecting these extraordinary stones, said "This donation represents my life's achievements in this domain." He called the red diamond the "highlight" of his career.

The Winston Red Diamond (Courtesy of Ronald Winston)

Old Mine Brilliant, 2.33ct Natural Fancy Red Diamond

Natural red diamonds are extremely rare, with researchers estimating fewer than 1 in 25 million earning the Fancy Red grade from the Gemological Institute of America (GIA). The Winston Red Diamond, distinguished in its size and remarkable old mine brilliant cut, suggests it was fashioned before the mid-1900s, further enhancing its historical and gemological significance. 

Museum experts are excited about the collection’s scientific and aesthetic value. Gabriela Farfan, the museum’s curator of gems and minerals, said, “These gems give us the opportunity to share with our visitors the full range of colors in which diamonds occur.”

A study on the Winston Red Diamond’s history and science is expected to be published in GIA’s Gems & Gemology journal in spring 2025. Meanwhile, visitors can experience the stunning diversity of these extraordinary gems in person when the exhibit opens this April.