Egg Cleansing and its results?

Many Native Americans and Latin Americans believe in "Egg Cleansing".So if you use an unbroken egg that has been sprayed with perfume and along with the herb of Rosemary you make crosses on your body and pray it is suppose to cleanse you from evil.I was wondering about when you crack open the egg and the different results people have.I know that blood spots means something bad and if the yolk is not yellow then that is bad as well and I also know if there is something that looks like an eye then someone is envying you.Basically what I am asking is what are the other possible results and the meanings of those other results.