Stones are approximately 1 to 2.5 cm long Best for Collection purpose also. 100% Authentic Banded Agate Tumbled Each and every stone is unique and you will receive stones similar to the images shown. These Banded Agate Tumbled Stones from India have some wonderful bands of greys, white, tan and golden brown. Often called the "earth rainbow", Banded Agate is a healing stone for body, mind and spirit. It can increase concentration, honesty and memory. Banded Agate also protects the wearer from psychic attack, thereby preventing negative energy from harming you. Agate is formed with bands of microscopic quartz crystals. It is both a grounding and a spiritual stone, allowing for one to bring their spiritual experiences into their everyday reality. Agate is believed to improve mental functions and can help where issues of clarity and stability are concerned. Agate is also helpful in overcoming negative emotions by bringing love into the chakras. Although they work very slowly and deliberately, this gentle nature of Agate helps it to have a lasting impact.