Hope Diamond
$350M
A 45.52-carat deep blue diamond with a legendary curse.
Estimated value as of 2026 · Source: Multiple sources including Luxury Evermore , BAUNAT , BriteCo , and Wikipedia
Fun Fact
It glows red for several minutes after being exposed to ultraviolet light.
More in Nature
$27 million
Californium-252 (per gram)
Californium-252 is a synthetic radioactive element produced in nuclear reactors, valued as an exceptional neutron source for medical and industrial applications.
$6.1B
Dog Collar
A dog collar is a band worn around a dog's neck, typically made of nylon or leather, used for identification, control, and attaching leashes.
$31.8M
Fossil Tyrannosaurus Rex Skeleton (Stan)
Nearly complete T-Rex skeleton auctioned for research and display.
$5M
Moon Rock Sample (From Apollo 17 Mission)
Lunar basalt specimen collected during humanity's final Apollo mission in 1972.