It is done when
«Her tru beauty sprouts in the heart and dwells in the eyes.»
Nowadays it is also common to speak of natural beauty to refer to that which is naturally displayed, without having had the need to go through the operating room to adjust any damage. In this sense, it is said that having trace beauty is having natural physical beauty. The opposite is artificial beauty, currently booming, which involves the use of cosmetic surgery to correct or increase some aspects of the body to make it more beautiful.