Californium-252 (per gram)
$27 million
Californium-252 is a synthetic radioactive element produced in nuclear reactors, valued as an exceptional neutron source for medical and industrial applications.
Estimated value as of 2026 · Source: https://frontier-cf252.com/blog/complete-guide-californium/
Fun Fact
As of 2023, only about 10 grams of californium-252 existed globally, making it orders of magnitude rarer than gold or diamonds.
Price History
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