A rough diamond from Arkansas’ famed Crater of Diamonds State Park is among the gemstone and jewelry treasures now sealed inside America’s official 250th anniversary time capsule — a 900-pound stainless steel cylinder and companion bell jar designed to preserve more than 200 artifacts for the next two and a half centuries.
Officially sealed last week at the National Institute of Standards and Technology (NIST) in Gaithersburg, Md., the America250 capsule will be buried on July 4, 2026, at Philadelphia’s Independence Mall and reopened 250 years later, during the nation’s 500th birthday celebration in 2276. Inside are contributions from all 50 states, Washington, D.C., and five U.S. territories, creating a remarkable snapshot of American life, culture and innovation.
For Arkansas, the choice was obvious: a diamond sourced directly from its internationally renowned park in Murfreesboro.
The park occupies a unique place in American history and geology. It is the only location in the United States where visitors can search for real diamonds in their original volcanic source and keep whatever they discover. The Arkansas250 Commission noted that the gem symbolizes how “adventure is real, discovery is hands-on and opportunity is never out of reach.”
As part of the Semiquincentennial celebration, the Arkansas250 Commission is installing six special historical markers across the state, with Crater of Diamonds State Park selected to receive a custom-designed marker honoring its extraordinary heritage.
Arkansas isn't the only contributor with a gemstone or jewelry connection.
Idaho submitted its official state gemstone, the rare Idaho Star Garnet, prized for the star-like reflection that appears across its surface. New Mexico contributed a sterling silver squash blossom necklace set with Kingman turquoise and crafted by Navajo silversmith Harrison Yazzie, celebrating one of the most enduring forms of Native American jewelry. Guam offered a traditional Chamorro "Gualofan" ornament pendant fashioned from orange spiny oyster shell and shaped to symbolize the full moon.
Michigan included its beloved Petoskey stone, a fossilized coral dating back roughly 350 million years, while Oregon contributed a handcrafted "She Who Watches" pin by Native American artist Lillian Pitt. Also included was a crystal from the 2026 New Year's Eve Ball Drop in New York City's Times Square.
The gemstone and jewelry pieces share space with an eclectic assortment of American icons. Among them are an iPhone 17 Pro Max, a pocket Constitution signed by Supreme Court justices, a fragment of fabric from the Wright brothers' 1903 airplane and an original glass Coca-Cola bottle containing commemorative artifacts.
Perhaps the most futuristic item comes from the Library of Congress: a tiny synthetic DNA capsule encoded with digital copies of historic treasures, including Thomas Jefferson's rough draft of the Declaration of Independence, handwritten lyrics to "The Star-Spangled Banner," an 1898 recording of the anthem performed by John Philip Sousa's band and samples of Native tribal languages.
On July 4th in Philadelphia these items will be buried 10 feet deep, sealed away beneath layers of steel and science, waiting patiently to tell America's story to generations yet unborn.
Credits: Time capsule and bell jar photo by Rich Press/National Institute of Standards and Technology (NIST). Arkansas diamond photo courtesy of Crater of Diamonds State Park (not the actual diamond in the time capsule). Other images uncredited via america250.org.