The very first thing I learned about magic was cutting an apple horizontally gives you a five-pointed star. I was then told that each point is for one of the five elements: earth, air, fire, water and spirit.
Apples are a symbol of many things including: fertility, knowledge, wisdom, marriage, divination, immortality, peace and love, but also of deceit, discord, and death, depending on what culture you look to.
I was given the two halves of the apple and told to give half to someone I was attracted to and eat the other half. This was a very simple love charm, used to encourage growth of those feelings.