The Mirror of Venus is the fundamental feminine symbol. It represents love, fertility and peace. It also represents the planet Venus, the element of copper, and - of course - the female sex.
The pentagram represents the four elements - earth, air, fire and water - with a fifth included, spirit, to represent the human element. The spirit point should be facing north (or at least be at the top of the star) to represent white magic - healing, protection and positive growth.
If you choose this symbol, be sure to situate it on the right side of your body. Traditionally, things situated to the right represent positivity, hence the colloquial name for white magic - the 'right-hand path.'