Up to 1" . Banded Agate is considered a great stone for healing mind, body, and spirit. It is used for protection, security and moral stability. Green Agate is wonderful for activating the chakras from the heart chakra down. It can ground and balance the auric field giving stability and balance. According to modern healers who use stones in healing, green agate increases compassion, generosity and a keen sense of justice, along with mental and emotional flexibility, improving decision-making and resolving disputes.