Saturn's rings are primarily made up of ice (mostly water ice) and rock (mostly dust and rocky debris). The proportions of ice and rock vary depending on the ring, but in general, the rings are about 99% ice and 1% rock.

Here's a breakdown:

* Ice: The majority of Saturn's rings are made up of water ice, which is why they appear so bright and reflective. The ice particles range in size from tiny grains to boulder-sized chunks.

* Rock: The remaining 1% of the rings is made up of rocky debris, including dust, gravel, and larger rocks. This rocky material comes from various sources, such as the disintegration of moons or asteroids.

It's important to note that the composition of Saturn's rings is not uniform throughout. Different rings have different compositions and structures. For example, the A ring is known for its higher concentration of rock, while the C ring is more icy.