Hope Diamond
$350M
Estimated value as of 2026 · Multiple sources including Luxury Evermore [2], BAUNAT [3], BriteCo [6], and Wikipedia [9]
A 45.52-carat deep blue diamond with a legendary curse.
Fun fact It glows red for several minutes after being exposed to ultraviolet light.
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More in Nature
$31.8M
Fossil Tyrannosaurus Rex Skeleton (Stan)
Nearly complete T-Rex skeleton auctioned for research and display.
$27 million
Californium-252 (per gram)
Rare synthetic element produced in nuclear reactors, the rarest element in practical use.
$5M
Moon Rock Sample (From Apollo 17 Mission)
Lunar basalt specimen collected during humanity's final Apollo mission in 1972.
$2.029M
Gold Bar (400 oz)
A standard 400 troy ounce gold bar, the kind stored in Fort Knox.