Cubic Zirconia
$10 per carat
A synthetic diamond alternative that costs just $10-20 per carat.
Estimated value as of 2026 · Source: User query statement and general market knowledge; no precise current market cap…
Fun Fact
Cubic zirconia is actually denser than real diamonds but far less durable.
Price History
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.