Another "test" used to check if the evil eye was cast is that of the oil: under normal conditions, olive oil floats in water, as it is less dense than water. The test of the oil is performed by placing one drop of olive oil in a glass of water, typically holy water. If the drop floats, the test concludes there is no evil eye involved. If the drop sinks, then it is asserted that the evil eye is cast indeed. Another form of the test is to place two drops of olive oil into a glass of water. If the drops remain separated, the test concludes there is no evil eye, but if they merge, there is. There is also a third form where in a plate full of water the "healer" places three or nine drops of oil. If the oil drops become larger and eventually dissolve in the water there is evil eye. If the drops remain separated from water in a form of a small circle there isn't. The first drops are the most important and the number of drops that dissolve in water indicate the strength of the evil eye. Note that a secret chant is spoken when these tests are conducted. The words of the chant are closed practised and can only be passed from man to woman, or woman to man.