Jade rice is white rice that has been infused with bamboo extract, lending it a lovely green color. It is supposed to be highly nutritious, with 10g of fiber, 5g of protein and antioxidants in each 1/4 cup. The company brand name that I found is Lotus Foods, and you may be able to find it in a natural food or gourmet grocery, sold in bulk. As you can see, it is very pretty.
You cook it as you would cook white rice. In my batch, I mixed it with brown rice, which probably diluted the color, but even when cooked alone, the green color washes out, unfortunately. The resulting cooked rice looks much like regular white/brown rice.
But, it really does have a distinct flavor, something vegetative... it's nice and lightly aromatic. If you can find it, you might like to try it yourself!