Neptune experiences a form of precipitation known as "diamond rain." This occurs deep in its atmosphere where immense pressure and high temperatures cause carbon-containing compounds like methane to break down, allowing carbon atoms to crystallize into diamonds. These diamonds then fall, or "rain," down toward the planet's interior. This phenomenon has been supported by laboratory experiments simulating Neptune's extreme conditions, where scientists recreated diamond formation from hydrocarbon compounds under high pressure and temperature. The diamonds formed can be very large and heavy, sinking through the atmosphere and possibly influencing Neptune's magnetic field and internal heat generation. However, this diamond rain is far from the kind of rain we experience on Earth and is not accessible for collection or use as gemstones