AzureGreen 6mm Rounded Purple Amethyst Inspire Peace and Hope Agate Ring Size 6.5 Used throughout history, these agate rings are known for providing bravery, vitality and protection. Varieties include Black Onyx, Rose Quartz, Red Carnelian, Purple Amethyst, Green Aventuine, Mystic Moonstone. See separate listing for each Agate and Size.