Blue Onyx Obelisk. Colors of White, Tan Blue, Green Polished Stone 0302 You will receive one stone from the ones pictured in this listing. Size is approximate. Blue onyx is a stone of strength, giving you a support in confusing or difficult times, as well as in times of stress. This truth stone is helpful in making sensible decisions. This stone helps one to heal old grief, sadness and trauma. It is also believed to be helpful in past life work for the healing of physical trauma and old injuries, which are affecting your life in present. See more at stonepathtrading.com