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the claim

Diamonds rain on Uranus and Neptune

the verdict
SUPPORTED
the evidence backs this
Recorded sources
2 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that diamonds rain on Uranus and Neptune?

Yes. Multiple studies demonstrate that the extreme high-pressure and high-temperature conditions inside ice giants like Uranus and Neptune facilitate the chemical demixing of hydrocarbons, leading to diamond precipitation (often referred to as diamond rain).

Verdict: SUPPORTED · 2 sources for, 0 against · Last checked

The analysis

The retrieved literature contains specific thermodynamic and shock-compression studies (e.g., [0], [6]) showing that diamond precipitation is thermodynamically favorable and experimentally reproducible under the extreme interior conditions of ice giant planets such as Uranus and Neptune.

Evidence for · 2
Thermodynamics of diamond formation from hydrocarbon mixtures in planets.
2023
The study establishes the thermodynamic conditions for diamond formation from hydrocarbon mixtures within ice giants like Uranus and Neptune.
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B, C., S, H., & M, B. (2023). Thermodynamics of diamond formation from hydrocarbon mixtures in planets.. doi.org. https://doi.org/10.1038/s41467-023-36841-1

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More for · 1
Diamond formation kinetics in shock-compressed C─H─O samples recorded by small-angle x-ray scattering and x-ray diffraction.
2022
Experimental shock-compression research demonstrates that extreme conditions inside ice giants lead to the precipitation of diamonds.
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Z, H., M, R., J, L., A, B., M, B., D, C., TE, C., A, D., M, F., E, G., AE, G., GD, G., SH, G., Y, I., NJ, H., JA, H., B, H., OS, H., N, K., K, K., D, K., HJ, L., EE, M., K, M., B, N., B, O., N, O., S, P., C, Q., D, R., R, R., C, S., AK, S., MG, S., K, S., T, T., T, V., K, V., J, V., M, Y., T, Y., LMV, Z., A, R., & D, K. (2022). Diamond formation kinetics in shock-compressed C─H─O samples recorded by small-angle x-ray scattering and x-ray diffraction.. doi.org. https://doi.org/10.1126/sciadv.abo0617

What does the evidence say?

The retrieved literature contains specific thermodynamic and shock-compression studies (e.g., [0], [6]) showing that diamond precipitation is thermodynamically favorable and experimentally reproducible under the extreme interior conditions of ice giant planets such as Uranus and Neptune.

Receipt History
first checked04 Aug 2026
judged → SUPPORTED · 8404 Aug 2026
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