Erthrite (is sometimes called Vivianite) is said to be a wonderful crystal to help with group endeavors, as it brings loving compassion into any situation.
It is said to assist with communication and help you tune into your higher self finding answers to any questions you ask.
On a chakra level it helps smooth the flow of energy bringing them into improved balance. It’s a stone of personal empowerment and self-confidence. Erythrite is thought to strengthen your personal power.