Jewels are collectible items found in Rayman 3: Hoodlum Havoc and Rayman: Hoodlums' Revenge. They come in three colours: yellow, red, and green, each giving a different number of points. They can be found scattered around each level, some in Rayman's path, some hidden. Once Rayman has destoyed a cage and freed the Teensies inside, they may give Rayman some gems.

A yellow jewel
These are splendid jewels that the game developers have scattered around for purely aesthetic reasons. The Hoodlums collect them and put them into Porkibanks – pig-shaped money boxes that go all snouty when you beat them. You'll need to load your fist to break them.
A red jewel

Yellow jewel

The most common type of jewel. It gives Rayman 10 points once he has collected it. Each one is shaped like a diamond with a point on the top.

Red jewel

This jewel gives Rayman 30 points when he has collected it. Their appearance is that of a ruby.

 
A green jewel

Green jewel

The green jewel is the rarest; there are only a few to find in the whole game, and they are usually well-hidden. They give Rayman 1500 points, much more than the other jewels. This jewel looks like an emerald.