In crystal healing Banded Onyx is seen as a stone of happiness, good fortune and strength. Green Banded Onyx is associated with the heart. It brings strength, balance and self control. It is perfect for people under extreme mental or emotional stress. It brings balance to mind or body as well as a sense of security. Onyx is a great stone for people who are off with the fairies as it brings focus and grounding making it easier to remain in this realm. An empowering stone that can help you approach a lesson or task with self-confidence.