For dark circles , drop this little homemade mask :mix 1 level tablespoon of talc (it's clay!), 1 teaspoon of powdered sugar and a few drops of cold water until a soft dough is obtained; leave for 10 to 15 minutes then rinse with cold water.
You can also mix equal parts plain yoghurt and clay; then place the dough generously under the eyes, leave on 15 to 30 minutes , then rinse with lukewarm water.