It rains diamonds on Neptune and Uranus
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The extreme pressure and temperature conditions in the interiors of Neptune and Uranus — millions of atmospheres of pressure at temperatures of thousands of degrees — are sufficient to break down hydrocarbon molecules into carbon and hydrogen. The carbon atoms, under these conditions, form diamond crystals that literally precipitate downward through the planetary interior like rain. Scientists have experimentally replicated these conditions and confirmed diamond formation. On Neptune, it may rain literal diamonds into a liquid diamond ocean.
What we consider one of Earth's rarest and most valuable materials falls as precipitation on distant planets. The universe is neither scarce nor romantic about diamonds.
The Science Behind It
The extreme pressure and temperature conditions in the interiors of Neptune and Uranus — millions of atmospheres of pressure at temperatures of thousands of degrees — are sufficient to break down hydrocarbon molecules into carbon and hydrogen. The carbon atoms, under these conditions, form diamond crystals that literally precipitate downward through the planetary interior like rain. Scientists have experimentally replicated these conditions and confirmed diamond formation. On Neptune, it may rain literal diamonds into a liquid diamond ocean.
Why Your Brain Finds This Hard to Believe
Sources & Verification
OddlyHuman Editors
VerifiedWritten and fact-checked by the OddlyHuman Behavioral Science Team. We verify all psychological, sociological, and historical claims against peer-reviewed journals, primary sources, and established encyclopedias to bring you accurate insights.
Read our Editorial Guidelines →“It literally rains diamonds on Neptune and Uranus. There may be liquid diamond oceans deep in those planets.”