Agate comes from the rock formation class of Chalcedony and also quartz. Agate can be found in many shades – from blue, red, purple, black, green, brown, pink, and more. 
Agate means healing and grounding.
Emotionally, Agate is a glorious gift for upping your self-confidence. For those who struggle with decision making or who tend to sit on the fence, Agate can encourage you to tap into your own deep well of intuition, to connect with your sense of knowledge, and to look inwards for the answers rather than to external forces. 
Agate stones are often crystals of strength and courage, they enhance our mental functions, they keep us sharp of mind and clear of heart, and they invite us to turn up the dial on our analytical abilities when it comes to sifting through problems.