
I find Rose Quartz to be as equally powerful as clear Quartz crystal. But its effects are more subtle. More on a healing & grounding level. It clears the mind of unwanted kundalini energies, from personal experiences that is, including the dross of stray and unwanted images & thoughts.
The second piece in my collection was a gift from friends we visited here in New Zealand in 2000 before we decided to move over here from the UK. It has a totally different feel to the other piece. It has an entirely different personality -- crystals are individuals and therefore as diverse as us humans -- being more insistent on transfering energies into my endocrine system. I've actually 'programmed' this one to be used prior to any major decision making. It appears to have the effect of providing calmness and clarity.
Pink quartz (rose quartz) allows you to be in touch with your basic self. It will allow you to get to know your true self. It can also allow you to communicate internally with your inner self.