Chrysocolla

Chrysocolla is a stone of harmony, both on a universal level and a very specific level. It can be used to purify a place or remove negativity from a person. It is a very gentle stone and its energy works in a gentle, harmonious way. It can help ease fear, anxiety, and guilt, and bring hope. It is also used to communicate with the spiritual forces of the Earth.
This means any sort of meditation, mindfulness, or magic that has to do with emotional situations, as well as magic that literally draws on the power of the ocean.