Calcite allows you to see clearly through a problem to get to the root cause. In this way it allows one to adjust their views with a truer reflection of a problem so that forgiveness can be made to self and others. It helps release attachments to the past and let go of anger. It is also a powerful stone that can be programmed with ones intent and it helps you start over with a clean slate. It is also good to use in meditation as it allows for deep introspection from all angles. 
Uses - Insight, Clarity, Manifestation, Forgiveness