Probably a variety of things, but I believe the answer you're looking for is "a comet".
Saturn?
A chunk of ice, rock, and dust that moves around the sun is called a comet. Comets are often characterized by their bright tails, which form when they approach the sun and the heat causes their icy components to vaporize, releasing gas and dust. They typically have elongated orbits that can take them far from the sun before returning.
Neptune is our 8th planet in the solar system!
The planet Uranus is sometimes referred to as the "green planet" due to the presence of methane in its atmosphere, which gives it a greenish hue. This large icy planet is the seventh planet from the Sun in our solar system.
The moon Miranda is believed to have existing ice on it but theoretically it is Co2 which has given the planet an icy look but yes, the planet Miranda does have tiny slates of ice on the surface of the planet
None. Ceres is the smallest object currently classified as a dwarf planet.
Pluto is a rocky icy dwarf planet.
None. Ceres is the smallest of the dwarf planets.
Saturn?
No. Saturn is made of icy clouds, it has no physical surface exept for a small, earth size rock
There is no planet with large rings and icy rocks. Saturn has rings, but it is not a rocky planet - it is a gas giant.
No. Triton is an icy moon, not a planet.
Pluto, a dwarf planet.
comet
uranus
go to the tubeline bridge for icciruis city after 8pm and talk to the lady at the sign and she will give you an icy rock
you might be talking about Pluto, but its not considered a planet anymore.