Nine Pearls Puzzle

You have nine pearls.

Eight of them are real pearls, and one of them is a fake.

The eight real ones all weigh exactly the same. But the fake pearl weighs slightly less than the real ones.

With no more than two uses of a balance scale, how can you find the fake pearl?

(The difference in weight is so small that you must use the scale. The only way to decipher the fake pearl is by weight.)